diff --git a/Service/Charger/Codec/Decoder.cs b/Service/Charger/Codec/Decoder.cs
index 99ff833..4afc699 100644
--- a/Service/Charger/Codec/Decoder.cs
+++ b/Service/Charger/Codec/Decoder.cs
@@ -71,7 +71,6 @@ public class Decoder : ByteToMessageDecoder
                 ASDU asdu = Parse(buffer, totalFrameLength, delimiter, out data);
                 Log(chargerSn).Info($"receive {BitUtls.BytesToHexStr(data)}:{JsonConvert.SerializeObject(asdu)} from {chargerSn}");
                 output.Add(asdu);
-                buffer.Clear();
             }
             catch (Exception e)
             {