diff --git a/src/main/java/com/campus/water/entity/WaterTerminalLocation.java b/src/main/java/com/campus/water/entity/WaterTerminalLocation.java
index ebd5f23..f92ce7d 100644
--- a/src/main/java/com/campus/water/entity/WaterTerminalLocation.java
+++ b/src/main/java/com/campus/water/entity/WaterTerminalLocation.java
@@ -1,5 +1,5 @@
 package com.campus.water.entity;
-
+import java.math.BigDecimal;
 import lombok.Data;
 import jakarta.persistence.*;
 
@@ -25,16 +25,16 @@ public class WaterTerminalLocation {
     private String terminalName;
 
     /**
-     * 经度（高德GCJ-02坐标系，地图定位核心字段）
+     * 经度（高德GCJ-02坐标系，改用DECIMAL类型支持精度配置）
      */
-    @Column(name = "longitude", nullable = false, precision = 10, scale = 6)
-    private Double longitude;
+    @Column(name = "longitude", nullable = false, columnDefinition = "DECIMAL(10,6)")
+    private BigDecimal longitude;
 
     /**
-     * 纬度（高德GCJ-02坐标系，地图定位核心字段）
+     * 纬度（高德GCJ-02坐标系，改用DECIMAL类型支持精度配置）
      */
-    @Column(name = "latitude", nullable = false, precision = 10, scale = 6)
-    private Double latitude;
+    @Column(name = "latitude", nullable = false, columnDefinition = "DECIMAL(10,6)")
+    private BigDecimal latitude;
 
     /**
      * 是否可用（关联device表的status字段：online→true，offline/fault→false）
diff --git a/src/main/java/com/campus/water/entity/vo/TerminalLocationVO.java b/src/main/java/com/campus/water/entity/vo/TerminalLocationVO.java
index 8492273..a40dfd6 100644
--- a/src/main/java/com/campus/water/entity/vo/TerminalLocationVO.java
+++ b/src/main/java/com/campus/water/entity/vo/TerminalLocationVO.java
@@ -1,30 +1,15 @@
 package com.campus.water.entity.vo;
 
 import lombok.Data;
+import java.math.BigDecimal;
 
-/**
- * 终端机位置VO（整合坐标表+设备表数据，前端地图展示专用）
- */
 @Data
 public class TerminalLocationVO {
-    /** 终端机ID */
     private String terminalId;
-
-    /** 终端机名称 */
     private String terminalName;
-
-    /** 经度 */
-    private Double longitude;
-
-    /** 纬度 */
-    private Double latitude;
-
-    /** 是否可用 */
+    private BigDecimal longitude; // 同步改为BigDecimal
+    private BigDecimal latitude;  // 同步改为BigDecimal
     private Boolean isAvailable;
-
-    /** 安装位置（复用device表的install_location） */
     private String installLocation;
-
-    /** 设备状态（online/offline/fault） */
     private String deviceStatus;
 }
\ No newline at end of file