diff --git a/docs/功能测试-反向追溯.md b/docs/功能测试-反向追溯.md
new file mode 100644
index 00000000..d59c9cdc
--- /dev/null
+++ b/docs/功能测试-反向追溯.md
@@ -0,0 +1,36 @@
+# 功能测试 - 反向追溯
+
+> 模块：数据中台 / 基础追溯 / 反向追溯 (Backward Traceability)
+> 路由：`/data_middleground/basic_traceability/reverse_direction_traceability`
+
+## 测试前置条件
+
+- 测试账号具备访问“反向追溯”的菜单权限。
+- 准备至少 2 个电池条码：
+  - 一个存在完整反向追溯关系图的电池条码。
+  - 一个不存在追溯数据或数据为空的电池条码。
+- 后端接口 `data_middleground/basic_traceability/reverse_direction_traceability/get_data` 和 `export_tree` 可正常访问。
+
+## 测试任务列表
+
+| 序号 | 测试项 | 操作步骤 | 预期结果 |
+|---:|---|---|---|
+| 1 | 页面入口 | 从菜单进入“反向追溯”，或直接访问 `/data_middleground/basic_traceability/reverse_direction_traceability` | 页面正常打开，显示电池条码输入框、查询、导出、重置按钮和空态区域 |
+| 2 | 空输入查询 | 不输入电池条码，点击“查询” | 页面提示请输入电池条码，不发起有效查询 |
+| 3 | 有效条码查询 | 输入存在追溯数据的电池条码，点击“查询” | 页面展示追溯节点树，节点包含物料名称、编码、批次、工序、时间、设备等信息 |
+| 4 | 无数据条码查询 | 输入不存在追溯数据的电池条码，点击“查询” | 页面保持空态或显示无节点，不出现脚本错误 |
+| 5 | 横向/纵向切换 | 查询出数据后，切换“横向图谱”和“纵向图谱” | 追溯节点展示方向切换，页面不丢失数据 |
+| 6 | 物料编码定位 | 查询出数据后，输入某个节点的物料编码，点击定位确认 | 匹配节点高亮并滚动到可视区域 |
+| 7 | 物料批次定位 | 输入某个节点的物料批次，点击定位确认 | 匹配节点高亮并滚动到可视区域 |
+| 8 | 工序单元定位 | 输入某个制成品节点的工序单元编码，点击定位确认 | 匹配节点高亮并滚动到可视区域；不存在时提示未找到匹配节点 |
+| 9 | 导出前校验 | 未输入电池条码时点击“导出” | 页面提示请输入电池条码 |
+| 10 | 查询前导出 | 输入电池条码但未查询出追溯树，点击“导出” | 页面提示请先查询追溯数据后再导出 |
+| 11 | 正常导出 | 查询出追溯树后点击“导出” | 调用导出接口，浏览器开始下载或打开导出文件 |
+| 12 | 重置功能 | 查询出追溯树后点击“重置” | 输入框、追溯树、定位输入和高亮状态全部清空 |
+| 13 | 国际化检查 | 切换中英文语言后重新进入页面 | 页面按钮、节点字段和提示文案随语言切换显示 |
+
+## 回归关注点
+
+- 接口返回 `relation_graph.nodes` 或 `relation_graph.lines` 为空时页面不能报错。
+- 导出接口参数中的 `tree_list` 应为当前追溯树节点数组 JSON。
+- 路由参数携带 `battery_id` 时，页面应能自动查询对应追溯数据。
diff --git a/docs/迁移任务列表.md b/docs/迁移任务列表.md
index bafe9c90..9904ca7f 100644
--- a/docs/迁移任务列表.md
+++ b/docs/迁移任务列表.md
@@ -3,8 +3,8 @@
 > 根据 `后台Webman界面截图对照表.md` 生成。状态以当前 V2 项目中已落地的页面目录为准。
 
 - 总功能数：79
-- 已迁移：27
-- 未迁移：52
+- 已迁移：28
+- 未迁移：51
 
 | 状态 | 一级模块 | 二级模块 | 三级模块 | 功能说明 | V2 目标路径 |
 |:---:|---|---|---|---|---|
@@ -79,7 +79,7 @@
 | ⬜ | 质量管理 (Quality Management) | SPC计数型报表 (SPC Attribute Charts) | NPChart (NP Chart) |  | 待确认 |
 | ⬜ | 质量管理 (Quality Management) | SPC计数型报表 (SPC Attribute Charts) | CChart (C Chart) |  | 待确认 |
 | ⬜ | 质量管理 (Quality Management) | SPC计数型报表 (SPC Attribute Charts) | UChart (U Chart) |  | 待确认 |
-| ⬜ | 数据中台 (Data Platform) | 基础追溯 (Traceability) | 反向追溯 (Backward Traceability) |  | 待确认 |
+| ✅ | 数据中台 (Data Platform) | 基础追溯 (Traceability) | 反向追溯 (Backward Traceability) | 反向追溯 | `src/views/data-platform/traceability/backward/` |
 | ⬜ | 数据中台 (Data Platform) | 基础追溯 (Traceability) | 正向追溯 (Forward Traceability) |  | 待确认 |
 | ⬜ | 数据中台 (Data Platform) | 基础追溯 (Traceability) | 电池曲线 (Battery Curve) |  | 待确认 |
 | ⬜ | 数据中台 (Data Platform) | 基础追溯 (Traceability) | 托盘追溯 (Tray Traceability) |  | 待确认 |
diff --git a/src/api/data-platform/traceability/backward.js b/src/api/data-platform/traceability/backward.js
new file mode 100644
index 00000000..d39eb1c4
--- /dev/null
+++ b/src/api/data-platform/traceability/backward.js
@@ -0,0 +1,27 @@
+import { request } from '@/api/_service'
+
+const BASE = 'data_middleground/basic_traceability/reverse_direction_traceability/'
+
+function apiParams (method, data = {}) {
+  return {
+    method,
+    platform: 'background',
+    ...data
+  }
+}
+
+export function getBackwardTraceabilityData (data) {
+  return request({
+    url: BASE + 'get_data',
+    method: 'get',
+    params: apiParams('data_middleground_basic_traceability_reverse_direction_traceability_get_data', data)
+  })
+}
+
+export function exportBackwardTraceabilityTree (data) {
+  return request({
+    url: BASE + 'export_tree',
+    method: 'post',
+    data: apiParams('data_middleground_basic_traceability_reverse_direction_traceability_export_tree', data)
+  })
+}
diff --git a/src/locales/en.json b/src/locales/en.json
index 021a65d6..bb4b43bb 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -1187,6 +1187,44 @@
 				"accumulated_detail": "{device_name} ({device_code}): 10 Cumulative Error Details",
 				"workstation_detail": "Workstation [{device_name}] Channel Error Details"
 			}
+		},
+		"data_platform": {
+			"traceability": {
+				"backward": {
+					"query": "Search",
+					"reset": "Reset",
+					"export": "Export",
+					"battery_id": "Battery Barcode",
+					"enter_battery_id": "Enter battery barcode",
+					"view_type": "Graph Layout",
+					"horizontal": "Horizontal",
+					"vertical": "Vertical",
+					"position": "Locate",
+					"enter_item_code": "Enter material code",
+					"enter_item_batch": "Enter material batch",
+					"enter_work_unit": "Enter process unit",
+					"item_name": "Material Name",
+					"item_code": "Material Code",
+					"item_batch": "Material Batch",
+					"work_unit": "Process Unit",
+					"work_unit_name": "Process Unit Name",
+					"process_code": "Process Code",
+					"operator": "Material Handler",
+					"start_time": "Feeding Time",
+					"finish_time": "Completion Time",
+					"confirm_position": "Confirm Location",
+					"reverse": "Reverse Traceability",
+					"center": "Center",
+					"inspection_person": "Inspector",
+					"inspection_time": "Inspection Time",
+					"quality_person": "Quality Reviewer",
+					"quality_time": "Quality Review Time",
+					"device_name": "Device Name",
+					"device_code": "Device Code",
+					"node_not_found": "No matching node found",
+					"query_before_export": "Query traceability data before export"
+				}
+			}
 		}
 	},
 	"__MENU_TEMP_BEGIN__": "===== 以下为临时菜单翻译，后续统一删除 =====",
diff --git a/src/locales/zh-chs.json b/src/locales/zh-chs.json
index 1b2bf083..4761d119 100644
--- a/src/locales/zh-chs.json
+++ b/src/locales/zh-chs.json
@@ -1187,6 +1187,44 @@
 				"accumulated_detail": "{device_name}({device_code}) 10次累计通道异常详情",
 				"workstation_detail": "【{device_name}】工作站设备通道异常详情"
 			}
+		},
+		"data_platform": {
+			"traceability": {
+				"backward": {
+					"query": "查询",
+					"reset": "重置",
+					"export": "导出",
+					"battery_id": "电池条码",
+					"enter_battery_id": "请输入电池条码",
+					"view_type": "图谱形态",
+					"horizontal": "横向图谱",
+					"vertical": "纵向图谱",
+					"position": "定位",
+					"enter_item_code": "请输入物料编码",
+					"enter_item_batch": "请输入物料批次",
+					"enter_work_unit": "请输入工序单元",
+					"item_name": "物料名称",
+					"item_code": "物料编码",
+					"item_batch": "物料批次",
+					"work_unit": "工序单元",
+					"work_unit_name": "工序单元名称",
+					"process_code": "工序编码",
+					"operator": "卸料人",
+					"start_time": "投料时间",
+					"finish_time": "完成时间",
+					"confirm_position": "定位确认",
+					"reverse": "反向追溯",
+					"center": "中心",
+					"inspection_person": "点检人员",
+					"inspection_time": "点检时间",
+					"quality_person": "品质确认人员",
+					"quality_time": "品质确认时间",
+					"device_name": "设备名称",
+					"device_code": "设备编码",
+					"node_not_found": "未找到匹配节点",
+					"query_before_export": "请先查询追溯数据后再导出"
+				}
+			}
 		}
 	},
 	"__MENU_TEMP_BEGIN__": "===== 以下为临时菜单翻译，后续统一删除 =====",
diff --git a/src/router/modules/data-platform.js b/src/router/modules/data-platform.js
index 1723742e..85b4a438 100644
--- a/src/router/modules/data-platform.js
+++ b/src/router/modules/data-platform.js
@@ -13,6 +13,12 @@ export default {
       name: `${pre}index`,
       meta: { ...meta, title: '数据中台', root: '/data_middleground' },
       component: _import('system/function/module-index')
+    },
+    {
+      path: 'basic_traceability/reverse_direction_traceability',
+      name: `${pre}basic_traceability-reverse_direction_traceability`,
+      meta: { ...meta, cache: true, title: '反向追溯' },
+      component: _import('data-platform/traceability/backward')
     }
   ])('data_middleground-')
 }
diff --git a/src/views/data-platform/traceability/backward/index.vue b/src/views/data-platform/traceability/backward/index.vue
new file mode 100644
index 00000000..081ef76d
--- /dev/null
+++ b/src/views/data-platform/traceability/backward/index.vue
@@ -0,0 +1,335 @@
+<template>
+  <d2-container>
+    <template #header>
+      <div class="search-bar">
+        <el-form ref="form" :inline="true" :model="form" size="mini">
+          <el-form-item :label="$t(key('battery_id'))" prop="battery_id">
+            <el-input
+              v-model="form.battery_id"
+              :placeholder="$t(key('enter_battery_id'))"
+              clearable
+              style="width:260px"
+              @keyup.enter.native="fetchData"
+            />
+          </el-form-item>
+          <el-form-item>
+            <el-button type="primary" icon="el-icon-search" :disabled="loading" :loading="loading" @click="fetchData">
+              {{ $t(key('query')) }}
+            </el-button>
+            <el-button icon="el-icon-download" :disabled="loading" @click="exportTree">
+              {{ $t(key('export')) }}
+            </el-button>
+            <el-button icon="el-icon-refresh" :disabled="loading" @click="resetForm">
+              {{ $t(key('reset')) }}
+            </el-button>
+          </el-form-item>
+        </el-form>
+      </div>
+    </template>
+
+    <div v-loading="loading" class="traceability-page">
+      <el-empty v-if="!hasGraph" :description="$t(key('enter_battery_id'))" />
+      <template v-else>
+        <div class="trace-toolbar">
+          <div class="trace-toolbar__group">
+            <span class="toolbar-label">{{ $t(key('view_type')) }}</span>
+            <el-radio-group v-model="viewType" size="mini">
+              <el-radio-button label="horizontal">{{ $t(key('horizontal')) }}</el-radio-button>
+              <el-radio-button label="vertical">{{ $t(key('vertical')) }}</el-radio-button>
+            </el-radio-group>
+          </div>
+          <div class="trace-toolbar__locate">
+            <span class="toolbar-label">{{ $t(key('position')) }}</span>
+            <el-input v-model.trim="locator.item_code" size="mini" clearable :placeholder="$t(key('enter_item_code'))" />
+            <el-button size="mini" type="primary" @click="locateNode('item_code', locator.item_code)">
+              {{ $t(key('confirm_position')) }}
+            </el-button>
+            <el-input v-model.trim="locator.item_batch" size="mini" clearable :placeholder="$t(key('enter_item_batch'))" />
+            <el-button size="mini" type="primary" @click="locateNode('item_batch', locator.item_batch)">
+              {{ $t(key('confirm_position')) }}
+            </el-button>
+            <el-input
+              v-model.trim="locator.workingsubclass_code"
+              size="mini"
+              clearable
+              :placeholder="$t(key('enter_work_unit'))"
+            />
+            <el-button size="mini" type="primary" @click="locateNode('workingsubclass_code', locator.workingsubclass_code, true)">
+              {{ $t(key('confirm_position')) }}
+            </el-button>
+          </div>
+        </div>
+
+        <div :class="['trace-tree-wrap', 'trace-tree-wrap--' + viewType]">
+          <el-tree
+            ref="tree"
+            class="trace-tree"
+            :data="treeData"
+            node-key="id"
+            default-expand-all
+            :expand-on-click-node="false"
+          >
+            <template #default="{ data }">
+              <div :class="['trace-node', { 'is-active': activeNodeId === data.id }]" :data-node-id="data.id" @click="activeNodeId = data.id">
+                <div class="trace-node__title">
+                  <el-tag size="mini" type="warning" effect="dark">{{ data.data.type_name || '-' }}</el-tag>
+                  <strong>{{ data.text || data.id }}</strong>
+                </div>
+                <div class="trace-node__body">
+                  <p>{{ $t(key('item_name')) }}: {{ data.data.item_name || '-' }}</p>
+                  <p>{{ $t(key('item_code')) }}: {{ data.data.item_code || '-' }}</p>
+                  <p>{{ $t(key('item_batch')) }}: {{ data.data.item_batch || '-' }}</p>
+                  <p>{{ $t(key('work_unit')) }}: {{ data.data.workingsubclass_code || '-' }}</p>
+                  <p>{{ $t(key('work_unit_name')) }}: {{ data.data.workingsubclass_name || '-' }}</p>
+                  <p>{{ $t(key('process_code')) }}: {{ data.data.process_code || '-' }}</p>
+                  <p>{{ $t(key('start_time')) }}: {{ data.data.start_time || '-' }}</p>
+                  <p>{{ $t(key('finish_time')) }}: {{ data.data.finish_time || '-' }}</p>
+                  <p>{{ $t(key('inspection_person')) }}: {{ data.data.inspection_person || '-' }}</p>
+                  <p>{{ $t(key('inspection_time')) }}: {{ data.data.inspection_time || '-' }}</p>
+                  <p>{{ $t(key('quality_person')) }}: {{ data.data.quality_person || '-' }}</p>
+                  <p>{{ $t(key('quality_time')) }}: {{ data.data.quality_time || '-' }}</p>
+                  <p>{{ $t(key('device_name')) }}: {{ data.data.device_name || '-' }}</p>
+                  <p>{{ $t(key('device_code')) }}: {{ data.data.device_code || '-' }}</p>
+                </div>
+              </div>
+            </template>
+          </el-tree>
+        </div>
+      </template>
+    </div>
+  </d2-container>
+</template>
+
+<script>
+import { i18nMixin } from '@/composables/useI18n'
+import {
+  exportBackwardTraceabilityTree,
+  getBackwardTraceabilityData
+} from '@/api/data-platform/traceability/backward'
+
+export default {
+  name: 'data-platform-traceability-backward',
+  mixins: [i18nMixin('page.data_platform.traceability.backward')],
+  data () {
+    return {
+      loading: false,
+      form: {
+        battery_id: this.$route.params.battery_id || ''
+      },
+      traceData: {},
+      viewType: 'horizontal',
+      activeNodeId: '',
+      locator: {
+        item_code: '',
+        item_batch: '',
+        workingsubclass_code: ''
+      }
+    }
+  },
+  computed: {
+    graph () {
+      return this.traceData.relation_graph || {}
+    },
+    hasGraph () {
+      return Array.isArray(this.graph.nodes) && this.graph.nodes.length > 0
+    },
+    treeData () {
+      if (!this.hasGraph) return []
+      const nodeMap = new Map()
+      this.graph.nodes.forEach(node => {
+        nodeMap.set(String(node.id), {
+          ...node,
+          id: String(node.id),
+          data: node.data || {},
+          children: []
+        })
+      })
+      const childIds = new Set()
+      const lines = Array.isArray(this.graph.lines) ? this.graph.lines : []
+      lines.forEach(line => {
+        const from = nodeMap.get(String(line.from))
+        const to = nodeMap.get(String(line.to))
+        if (from && to) {
+          from.children.push(to)
+          childIds.add(to.id)
+        }
+      })
+      const rootId = this.graph.rootId ? String(this.graph.rootId) : ''
+      const root = rootId && nodeMap.get(rootId)
+      if (root) return [root]
+      return Array.from(nodeMap.values()).filter(node => !childIds.has(node.id))
+    }
+  },
+  mounted () {
+    if (this.form.battery_id) this.fetchData()
+  },
+  methods: {
+    ensureBatteryInput () {
+      if (this.form.battery_id) return true
+      this.$message.error(this.$t(this.key('enter_battery_id')))
+      return false
+    },
+    async fetchData () {
+      if (!this.ensureBatteryInput()) return
+      this.loading = true
+      try {
+        const res = await getBackwardTraceabilityData({ ...this.form })
+        const data = res && res.data ? res.data : res
+        this.traceData = data || {}
+        const firstNode = this.graph.nodes && this.graph.nodes[0]
+        this.activeNodeId = firstNode ? String(firstNode.id) : ''
+      } finally {
+        this.loading = false
+      }
+    },
+    resetForm () {
+      this.form.battery_id = ''
+      this.traceData = {}
+      this.activeNodeId = ''
+      this.locator = {
+        item_code: '',
+        item_batch: '',
+        workingsubclass_code: ''
+      }
+    },
+    locateNode (field, value, onlyFinalProduct = false) {
+      if (!value) return
+      const nodes = Array.isArray(this.graph.nodes) ? this.graph.nodes : []
+      const target = nodes.find(node => {
+        const data = node.data || {}
+        if (String(data[field] || '') !== String(value)) return false
+        if (!onlyFinalProduct) return true
+        return data.type_name === '制成品' && Number(data.status) === -1
+      })
+      if (!target) {
+        this.$message.warning(this.$t(this.key('node_not_found')))
+        return
+      }
+      this.activeNodeId = String(target.id)
+      if (this.$refs.tree) {
+        this.$refs.tree.setCurrentKey(this.activeNodeId)
+      }
+      this.$nextTick(() => {
+        const element = this.$el.querySelector(`[data-node-id="${this.activeNodeId}"]`)
+        if (element && element.scrollIntoView) {
+          element.scrollIntoView({ behavior: 'smooth', block: 'center', inline: 'center' })
+        }
+      })
+    },
+    async exportTree () {
+      if (!this.ensureBatteryInput()) return
+      if (!this.hasGraph) {
+        this.$message.warning(this.$t(this.key('query_before_export')))
+        return
+      }
+      const res = await exportBackwardTraceabilityTree({
+        ...this.form,
+        tree_list: JSON.stringify(this.graph.nodes || [])
+      })
+      const data = res && res.data ? res.data : res
+      this.downloadExport(data)
+    },
+    downloadExport (url) {
+      if (!url) return
+      const link = document.createElement('a')
+      link.href = url
+      link.download = `${this.form.battery_id}${this.$t(this.key('reverse'))}`
+      link.target = '_blank'
+      document.body.appendChild(link)
+      link.click()
+      document.body.removeChild(link)
+    }
+  }
+}
+</script>
+
+<style lang="scss" scoped>
+.search-bar {
+  margin-bottom: -18px;
+}
+
+.traceability-page {
+  min-height: 560px;
+}
+
+.trace-toolbar {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 10px 18px;
+  align-items: center;
+  margin-bottom: 12px;
+}
+
+.trace-toolbar__group,
+.trace-toolbar__locate {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  align-items: center;
+}
+
+.trace-toolbar__locate .el-input {
+  width: 190px;
+}
+
+.toolbar-label {
+  color: #606266;
+  font-size: 13px;
+  font-weight: 600;
+}
+
+.trace-tree-wrap {
+  height: calc(100vh - 230px);
+  min-height: 520px;
+  overflow: auto;
+  border: 1px solid #ebeef5;
+  border-radius: 4px;
+  background: #f7f9fb;
+  padding: 12px;
+}
+
+.trace-tree-wrap--horizontal {
+  ::v-deep .el-tree-node__children {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px 16px;
+  }
+}
+
+.trace-tree {
+  min-width: max-content;
+  background: transparent;
+}
+
+.trace-node {
+  width: 300px;
+  min-height: 300px;
+  padding: 10px;
+  margin: 8px 0;
+  border: 1px solid #dcdfe6;
+  border-radius: 4px;
+  background: #fff;
+  color: #303133;
+  cursor: pointer;
+}
+
+.trace-node.is-active {
+  border-color: #409eff;
+  box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.15);
+}
+
+.trace-node__title {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+  margin-bottom: 8px;
+}
+
+.trace-node__body p {
+  margin: 0;
+  padding: 4px 0;
+  border-bottom: 1px solid #f0f2f5;
+  line-height: 1.35;
+  white-space: normal;
+}
+</style>