diff --git a/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java b/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
index 7f6f88ac..398343f2 100644
--- a/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
+++ b/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
@@ -30,6 +30,8 @@ public class APIController extends BasicController{
     DeviceCacheCmdMapper cacheCmdMapper;
     @Autowired
     WarningMsgMapper warningMsgMapper;
+    @Autowired
+    GnssStatusMapper gnssStatusMapper;
 
     /****** config ack *******/
     @PostMapping(value = "/api/config_ack")
@@ -151,6 +153,7 @@ public class APIController extends BasicController{
         // 保存
         saveMsg(deviceId, tenantId,0xD312, uploadCmd, true);
 
+
         return null;
     }
 
@@ -189,10 +192,8 @@ public class APIController extends BasicController{
             // 保存
             saveMsg(deviceId, tenantId,cacheCmd.getMsgtype(), cacheCmd.getCmd(), true);
         }
-
-        // 检查iccid
+        // 设备上线后，检查是否需要重新查询更新 ICCID
         checkAndAskICCID(device);
-
         return null;
     }
 
@@ -244,16 +245,27 @@ public class APIController extends BasicController{
         msgMapper.insert(gnssMsg);
     }
 
-    void checkAndAskICCID(GnssDevice device){
-        if(device.getIccid() == null || device.getIccid().trim().isEmpty()) {
-            String sendCmd = "AT+ICCID";
-            int msgType = 0xD310 + 10; // DTU
-            short len = (short) (sendCmd.length() + 5);
-            sendCmd = Integer.toHexString(msgType) + HexUtil.Short2HexString(len) +
-                    HexUtil.Int2HexString(Integer.parseInt(device.getDeviceid())) +
-                    "01" + HexUtil.String2HexString(sendCmd);
-            rtcmClient.config(device.getDeviceid(), sendCmd);
+    void checkAndAskICCID(GnssDevice device) {
+        GnssStatus status = gnssStatusMapper.getByDeviceId(device.getDeviceid());
+
+        // 1. 检查设备是否有 ICCID记录 （初始化）
+        // 2. 检查设备是否从离线恢复 （防止更换 SIM 卡）
+        // 3. 如果两种情况都不满足，则不查询 ICCID
+
+        boolean isDeviceReconnecting = status != null && status.getState() == GnssStatus.STATE_OFFLINE;
+        boolean isIccidEmpty = device.getIccid() == null || device.getIccid().trim().isEmpty();
+
+        if (!isDeviceReconnecting && !isIccidEmpty) {
+            return;
         }
+
+        String sendCmd = "AT+ICCID";
+        int msgType = 0xD310 + 10; // DTU
+        short len = (short) (sendCmd.length() + 5);
+        sendCmd = Integer.toHexString(msgType) + HexUtil.Short2HexString(len) +
+                HexUtil.Int2HexString(Integer.parseInt(device.getDeviceid())) +
+                "01" + HexUtil.String2HexString(sendCmd);
+        rtcmClient.config(device.getDeviceid(), sendCmd);
     }
     void updateICCID(GnssDevice device, String dtuAck) {
         // 只检查 "ICCID:" 的十六进制部分
@@ -262,7 +274,6 @@ public class APIController extends BasicController{
         }
         String content = HexUtil.HexString2String(dtuAck);
         if(content.contains("+ICCID:")){
-            //System.out.println(content);
             String iccid = content.substring(content.indexOf("+ICCID:") + 8).trim();
             iccid = iccid.split("\r\n")[0].trim();
             device.setIccid(iccid);