diff --git a/viewsh-module-iot/viewsh-module-iot-gateway/src/main/java/com/viewsh/module/iot/gateway/codec/jt808/Jt808Decoder.java b/viewsh-module-iot/viewsh-module-iot-gateway/src/main/java/com/viewsh/module/iot/gateway/codec/jt808/Jt808Decoder.java
index fb39b91..a583301 100644
--- a/viewsh-module-iot/viewsh-module-iot-gateway/src/main/java/com/viewsh/module/iot/gateway/codec/jt808/Jt808Decoder.java
+++ b/viewsh-module-iot/viewsh-module-iot-gateway/src/main/java/com/viewsh/module/iot/gateway/codec/jt808/Jt808Decoder.java
@@ -163,9 +163,9 @@ public class Jt808Decoder {
             int extId = data[index] & 0xFF;
             int extLen = data[index + 1] & 0xFF;
 
-            // 验证剩余长度
+            // 验证剩余长度（设备端数据格式问题，跳过该扩展字段）
             if (index + 2 + extLen > data.length) {
-                log.warn("[parseExtensionFields][扩展字段长度越界: ID=0x{}, Len={}, Remaining={}]",
+                log.debug("[parseExtensionFields][扩展字段长度越界，跳过: ID=0x{}, Len={}, Remaining={}]",
                         String.format("%02X", extId), extLen, data.length - index - 2);
                 break;
             }