diff --git a/sec-beidou-ehm/src/main/java/com/imdroid/beidou_ehm/simcard/TrafficCardService.java b/sec-beidou-ehm/src/main/java/com/imdroid/beidou_ehm/simcard/TrafficCardService.java
index 59005b3b..cc9bb967 100644
--- a/sec-beidou-ehm/src/main/java/com/imdroid/beidou_ehm/simcard/TrafficCardService.java
+++ b/sec-beidou-ehm/src/main/java/com/imdroid/beidou_ehm/simcard/TrafficCardService.java
@@ -37,6 +37,10 @@ public class TrafficCardService {
             // ICCID变更，关闭旧映射，创建新映射
             closeExistingMapping(activeMapping);
             createNewMapping(device.getDeviceid(), currentIccid);
+
+             // 重置MSISDN以强制更新SIM卡号
+             // 换卡了必须重置这些内容，否则会显示旧卡号，后续的查询会出现问题
+            resetCardMsisdn(currentIccid);
             return true;
         }
 
@@ -101,4 +105,12 @@ public class TrafficCardService {
     private void closeExistingMapping(TrafficDeviceMapping mapping) {
         mappingMapper.endMapping(mapping.getId());
     }
+
+    public void resetCardMsisdn(String iccid) {
+        TrafficCard card = trafficCardMapper.findByIccid(iccid);
+        if (card != null && card.getMsisdn() != null && !card.getMsisdn().isEmpty()) {
+            card.setMsisdn("");
+            trafficCardMapper.updateCardInfo(card);
+        }
+    }
 }
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