diff --git a/Service/TBox/Codec/Decoder.cs b/Service/TBox/Codec/Decoder.cs
index f96dfc3..7ca0e25 100644
--- a/Service/TBox/Codec/Decoder.cs
+++ b/Service/TBox/Codec/Decoder.cs
@@ -17,13 +17,14 @@ public class Decoder : ByteToMessageDecoder
 
     private static readonly ILog Log = LogManager.GetLogger(typeof(Decoder));
 
-    private readonly int _fixedLength = 18;
+    private readonly int _fixedLength = 13;
 
     protected override void Decode(IChannelHandlerContext context, IByteBuffer input, List<object> output)
     {
         if (_fixedLength <= input.ReadableBytes)
         {
-            byte[] bytes = new byte[_fixedLength];
+            byte[] bytes = new byte[_fixedLength-1];
+            input.SkipBytes(1);
             input.ReadBytes(bytes);
 
             //TODO 实际开发时去掉
@@ -31,7 +32,7 @@ public class Decoder : ByteToMessageDecoder
 
             Log.Info($"receive {BitUtls.BytesToHexStr(bytes)}");
 
-            int id = BitConverter.ToInt32(new byte[] { bytes[3], bytes[2], bytes[1], bytes[0] }, 0);
+            int id = BitConverter.ToInt32(new byte[] { bytes[4], bytes[3], bytes[2], bytes[1] }, 0);
             Log.Info(
                 $"receive id={id} {BitUtls.BytesToHexStr(BitConverter.GetBytes(0x1882D0F3))} {BitUtls.BytesToHexStr(BitConverter.GetBytes(4090528280))}");
             BaseMsg baseMsg = id switch