diff --git a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/tyre/BaseTyreController.java b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/tyre/BaseTyreController.java
index b63107d9..bb5eccb4 100644
--- a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/tyre/BaseTyreController.java
+++ b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/tyre/BaseTyreController.java
@@ -499,4 +499,14 @@ public class BaseTyreController extends BaseController {
             this.color = color;
         }
     }
+
+    /**
+     * PDA查询轮胎累计行驶里程
+     */
+    @PostMapping("/pdaQueryTyreMileage")
+    @ResponseBody
+    public AjaxResult pdaQueryTyreMileage(String tyreEpc)
+    {
+        return success(baseTyreService.queryTyreMileageSummary(tyreEpc));
+    }
 }
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/domain/RecordTyreMileage.java b/ruoyi-system/src/main/java/com/ruoyi/system/domain/RecordTyreMileage.java
index fab9ea3f..eb6eb831 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/domain/RecordTyreMileage.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/domain/RecordTyreMileage.java
@@ -40,6 +40,10 @@ public class RecordTyreMileage extends BaseEntity
     private Long mileage;
     private Long mileageOld;
 
+    /** 历史段里程（差值） */
+    @Excel(name = "段里程")
+    private Long mileageOld;
+
     @Excel(name = "花纹深度")
     private String patternDepth;
 
@@ -154,6 +158,16 @@ public class RecordTyreMileage extends BaseEntity
         return mileage;
     }
 
+    public void setMileageOld(Long mileageOld)
+    {
+        this.mileageOld = mileageOld;
+    }
+
+    public Long getMileageOld()
+    {
+        return mileageOld;
+    }
+
     @Override
     public String toString() {
         return new ToStringBuilder(this,ToStringStyle.MULTI_LINE_STYLE)
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/mapper/RecordTyreMileageMapper.java b/ruoyi-system/src/main/java/com/ruoyi/system/mapper/RecordTyreMileageMapper.java
index bfb32d0a..9b7a25c2 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/mapper/RecordTyreMileageMapper.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/mapper/RecordTyreMileageMapper.java
@@ -61,4 +61,11 @@ public interface RecordTyreMileageMapper
      * @return 结果
      */
     public int deleteRecordTyreMileageByIds(String[] ids);
+
+    /**
+     * 根据轮胎RFID查询累计行驶里程
+     * @param tyreRfid
+     * @return
+     */
+    public Long selectTotalMileageByTyreRfid(String tyreRfid);
 }
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/IBaseTyreService.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/IBaseTyreService.java
index 7e3dd4cc..2e7b56cd 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/IBaseTyreService.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/IBaseTyreService.java
@@ -94,4 +94,6 @@ public interface IBaseTyreService
      * </p>
      */
     Map selectTyreDetailForWeb(BaseTyre baseTyre);
+
+    Map<String, Object> queryTyreMileageSummary(String tyreRfid);
 }
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/BaseTyreServiceImpl.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/BaseTyreServiceImpl.java
index 0346acdf..805f06e3 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/BaseTyreServiceImpl.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/BaseTyreServiceImpl.java
@@ -513,4 +513,67 @@ public class BaseTyreServiceImpl implements IBaseTyreService
             }
         }
     }
+
+    @Override
+    public Map<String, Object> queryTyreMileageSummary(String tyreRfid) {
+        Map<String, Object> result = new HashMap<>();
+        BaseTyre query = new BaseTyre();
+        query.setTyreEpc(tyreRfid);
+        BaseTyre tyre = baseTyreMapper.selectBaseTyreByEpc(query);
+        if (tyre == null) {
+            return result;
+        }
+
+        result.put("tyreNo", tyre.getTyreNo());
+        result.put("tyreBrand", tyre.getTyreBrand());
+        result.put("carNo", tyre.getCarNo());
+        result.put("wheelPostion", tyre.getWheelPostion());
+        result.put("tyreType", tyre.getTyreType());
+
+        // 1. 获取已结算的累计里程 (record_tyre_mileage 表中的 SUM(mileage_old))
+        Long settledMileage = recordTyreMileageMapper.selectTotalMileageByTyreRfid(tyreRfid);
+        if (settledMileage == null) {
+            settledMileage = 0L;
+        }
+
+        // 2. 计算当前在车里程 (如果是已装车状态)
+        long onCarMileage = 0;
+        if (StringUtils.isNotEmpty(tyre.getCarNo())) {
+            // 查找该轮胎在该车上的最近一次装车记录
+            RecordTyreInstall installQuery = new RecordTyreInstall();
+            installQuery.setTyreRfid(tyreRfid);
+            installQuery.setCarNo(tyre.getCarNo());
+            installQuery.setType("0"); // 装车
+            RecordTyreInstall lastInstall = recordTyreInstallMapper.selectRecordTyreInstallStart(installQuery);
+
+            if (lastInstall != null) {
+                // 查找该车辆最新的维保记录 (获取当前里程快照)
+                BizMaintenanceOrder orderQuery = new BizMaintenanceOrder();
+                orderQuery.setPlateNumber(tyre.getCarNo());
+                // 后台列表查询按时间倒序
+                List<BizMaintenanceOrder> orders = bizMaintenanceOrderMapper.selectBizMaintenanceOrderList(orderQuery);
+                if (orders != null && !orders.isEmpty()) {
+                    BizMaintenanceOrder latestOrder = orders.get(0);
+                    if (latestOrder.getInputMileage() != null) {
+                        long currentCarMileage = latestOrder.getInputMileage().longValue();
+                        if (currentCarMileage > lastInstall.getMileage()) {
+                            onCarMileage = currentCarMileage - lastInstall.getMileage();
+                        }
+                    }
+                }
+            }
+        }
+
+        result.put("settledMileage", settledMileage);
+        result.put("onCarMileage", onCarMileage);
+        result.put("totalMileage", settledMileage + onCarMileage);
+
+        // 3. 获取历史明细
+        RecordTyreMileage mileageQuery = new RecordTyreMileage();
+        mileageQuery.setTyreRfid(tyreRfid);
+        List<RecordTyreMileage> details = recordTyreMileageMapper.selectRecordTyreMileageList(mileageQuery);
+        result.put("mileageDetails", details);
+
+        return result;
+    }
 }
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/RecordTyreInstallServiceImpl.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/RecordTyreInstallServiceImpl.java
index 0d4c1fdf..21e70ce9 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/RecordTyreInstallServiceImpl.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/RecordTyreInstallServiceImpl.java
@@ -165,11 +165,19 @@ public class RecordTyreInstallServiceImpl implements IRecordTyreInstallService
              * 计算里程差插入里程记录表
              */
             long between = calculateMileageDifference(recordTyreInstall.getMileage(), start.getMileage());
+            
+            // 获取该轮胎的历史累计里程
+            Long totalMileage = recordTyreMileageMapper.selectTotalMileageByTyreRfid(recordTyreInstall.getTyreRfid());
+            if (totalMileage == null) {
+                totalMileage = 0L;
+            }
+            
             RecordTyreMileage recordTyreMileage =new RecordTyreMileage();
             recordTyreMileage.setTyreRfid(recordTyreInstall.getTyreRfid());
             recordTyreMileage.setStartTime(start.getCreateTime());
             recordTyreMileage.setEndTime(DateUtils.getNowDate());
-            recordTyreMileage.setMileage(between);
+            recordTyreMileage.setMileage(totalMileage + between); // 当前累计总里程
+            recordTyreMileage.setMileageOld(between); // 本段行驶里程
             recordTyreMileage.setCreateTime(DateUtils.getNowDate());
             recordTyreMileage.setCreateBy(recordTyreInstall.getCreateBy());
             recordTyreMileage.setRecordId(recordId);
diff --git a/ruoyi-system/src/main/resources/mapper/tyre/RecordTyreMileageMapper.xml b/ruoyi-system/src/main/resources/mapper/tyre/RecordTyreMileageMapper.xml
index 3c948b31..779e85bc 100644
--- a/ruoyi-system/src/main/resources/mapper/tyre/RecordTyreMileageMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/tyre/RecordTyreMileageMapper.xml
@@ -10,6 +10,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         <result property="startTime"    column="start_time"    />
         <result property="endTime"    column="end_time"    />
         <result property="mileage"    column="mileage"    />
+        <result property="mileageOld"    column="mileage_old"    />
         <result property="createBy"    column="create_by"    />
         <result property="createTime"    column="create_time"    />
         <result property="updateBy"    column="update_by"    />
@@ -23,10 +24,13 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
     </resultMap>
 
     <sql id="selectRecordTyreMileageVo">
+        select id, tyre_rfid, start_time, end_time, mileage, mileage_old, pattern_depth, create_by, create_time, update_by, update_time, remark from record_tyre_mileage
         select id, tyre_rfid, start_time, end_time, mileage, pattern_depth, plate_number, record_id, create_by, create_time, update_by, update_time, remark from record_tyre_mileage
     </sql>
 
     <select id="selectRecordTyreMileageList" parameterType="RecordTyreMileage" resultMap="RecordTyreMileageResult">
+        select rtm.id, rtm.tyre_rfid, rtm.start_time, rtm.end_time, rtm.mileage, rtm.mileage_old, rtm.pattern_depth,
+        rtm.create_by, rtm.create_time, rtm.update_by, rtm.update_time, rtm.remark,bt.tyre_brand,bt.tyre_no
         select rtm.id, rtm.tyre_rfid, rtm.start_time, rtm.end_time, rtm.mileage, rtm.pattern_depth,
         rtm.create_by, rtm.create_time, rtm.update_by, rtm.update_time, rtm.remark, rtm.plate_number, rtm.record_id, bt.tyre_brand, bt.tyre_no
         from record_tyre_mileage rtm
@@ -54,6 +58,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             <if test="startTime != null ">start_time,</if>
             <if test="endTime != null ">end_time,</if>
             <if test="mileage != null ">mileage,</if>
+            <if test="mileageOld != null ">mileage_old,</if>
             <if test="createBy != null  and createBy != ''">create_by,</if>
             <if test="createTime != null ">create_time,</if>
             <if test="updateBy != null  and updateBy != ''">update_by,</if>
@@ -69,6 +74,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             <if test="startTime != null ">#{startTime},</if>
             <if test="endTime != null ">#{endTime},</if>
             <if test="mileage != null ">#{mileage},</if>
+            <if test="mileageOld != null ">#{mileageOld},</if>
             <if test="createBy != null  and createBy != ''">#{createBy},</if>
             <if test="createTime != null ">#{createTime},</if>
             <if test="updateBy != null  and updateBy != ''">#{updateBy},</if>
@@ -87,6 +93,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             <if test="startTime != null ">start_time = #{startTime},</if>
             <if test="endTime != null ">end_time = #{endTime},</if>
             <if test="mileage != null ">mileage = #{mileage},</if>
+            <if test="mileageOld != null ">mileage_old = #{mileageOld},</if>
             <if test="createBy != null  and createBy != ''">create_by = #{createBy},</if>
             <if test="createTime != null ">create_time = #{createTime},</if>
             <if test="updateBy != null  and updateBy != ''">update_by = #{updateBy},</if>
@@ -109,4 +116,8 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         </foreach>
     </delete>
     
+    <select id="selectTotalMileageByTyreRfid" parameterType="String" resultType="Long">
+        select COALESCE(SUM(mileage_old), 0) from record_tyre_mileage where tyre_rfid = #{tyreRfid}
+    </select>
+
 </mapper>