diff --git a/net/src/main/java/com/zfoo/net/handler/codec/tcp/TcpPacketCodecHandler.java b/net/src/main/java/com/zfoo/net/handler/codec/tcp/TcpPacketCodecHandler.java
index 0ef45430..e0c9e053 100644
--- a/net/src/main/java/com/zfoo/net/handler/codec/tcp/TcpPacketCodecHandler.java
+++ b/net/src/main/java/com/zfoo/net/handler/codec/tcp/TcpPacketCodecHandler.java
@@ -16,9 +16,8 @@ package com.zfoo.net.handler.codec.tcp;
 import com.zfoo.net.NetContext;
 import com.zfoo.net.packet.model.DecodedPacketInfo;
 import com.zfoo.net.packet.model.EncodedPacketInfo;
+import com.zfoo.net.packet.service.PacketService;
 import com.zfoo.net.util.SessionUtils;
-import com.zfoo.protocol.ProtocolManager;
-import com.zfoo.protocol.util.IOUtils;
 import com.zfoo.protocol.util.StringUtils;
 import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
@@ -28,7 +27,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.List;
-import java.util.Objects;
 
 /**
  * header(4byte) + protocolId(2byte) + packet
@@ -44,7 +42,7 @@ public class TcpPacketCodecHandler extends ByteToMessageCodec<EncodedPacketInfo>
     @Override
     protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) {
         // 不够读一个int
-        if (in.readableBytes() <= ProtocolManager.PROTOCOL_HEAD_LENGTH) {
+        if (in.readableBytes() <= PacketService.PACKET_HEAD_LENGTH) {
             return;
         }
         in.markReaderIndex();
diff --git a/net/src/main/java/com/zfoo/net/handler/codec/websocket/WebSocketCodecHandler.java b/net/src/main/java/com/zfoo/net/handler/codec/websocket/WebSocketCodecHandler.java
index 5d08982c..4d4c7622 100644
--- a/net/src/main/java/com/zfoo/net/handler/codec/websocket/WebSocketCodecHandler.java
+++ b/net/src/main/java/com/zfoo/net/handler/codec/websocket/WebSocketCodecHandler.java
@@ -17,9 +17,8 @@ import com.zfoo.net.NetContext;
 import com.zfoo.net.handler.codec.tcp.TcpPacketCodecHandler;
 import com.zfoo.net.packet.model.DecodedPacketInfo;
 import com.zfoo.net.packet.model.EncodedPacketInfo;
+import com.zfoo.net.packet.service.PacketService;
 import com.zfoo.net.util.SessionUtils;
-import com.zfoo.protocol.ProtocolManager;
-import com.zfoo.protocol.util.IOUtils;
 import com.zfoo.protocol.util.JsonUtils;
 import com.zfoo.protocol.util.StringUtils;
 import io.netty.buffer.ByteBuf;
@@ -33,7 +32,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.List;
-import java.util.Objects;
 
 /**
  * header(4byte) + protocolId(2byte) + packet
@@ -51,7 +49,7 @@ public class WebSocketCodecHandler extends MessageToMessageCodec<WebSocketFrame,
         ByteBuf in = webSocketFrame.content();
 
         // 不够读一个int
-        if (in.readableBytes() <= ProtocolManager.PROTOCOL_HEAD_LENGTH) {
+        if (in.readableBytes() <= PacketService.PACKET_HEAD_LENGTH) {
             return;
         }
 
diff --git a/net/src/main/java/com/zfoo/net/packet/service/PacketService.java b/net/src/main/java/com/zfoo/net/packet/service/PacketService.java
index 6eeee6a9..b0cc4e06 100644
--- a/net/src/main/java/com/zfoo/net/packet/service/PacketService.java
+++ b/net/src/main/java/com/zfoo/net/packet/service/PacketService.java
@@ -41,6 +41,11 @@ public class PacketService implements IPacketService {
 
     private static final Logger logger = LoggerFactory.getLogger(PacketService.class);
 
+    /**
+     * 包体的头部的长度，一个int字节长度
+     */
+    public static final int PACKET_HEAD_LENGTH = 4;
+
     /**
      * 网络包的约定规则如下：
      * 1. 客户端的请求约定以Request结尾，服务器的响应约定以Response结尾
@@ -124,7 +129,7 @@ public class PacketService implements IPacketService {
         buffer.clear();
 
         // 预留写入包的长度，一个int字节大小
-        buffer.writeInt(ProtocolManager.PROTOCOL_HEAD_LENGTH);
+        buffer.writeInt(PACKET_HEAD_LENGTH);
 
         // 写入包packet
         ProtocolManager.write(buffer, packet);
@@ -140,7 +145,7 @@ public class PacketService implements IPacketService {
 
         int length = buffer.readableBytes();
 
-        int packetLength = length - ProtocolManager.PROTOCOL_HEAD_LENGTH;
+        int packetLength = length - PACKET_HEAD_LENGTH;
 
         buffer.writerIndex(0);
 
diff --git a/net/src/test/java/com/zfoo/net/protocol/ProtocolTest.java b/net/src/test/java/com/zfoo/net/protocol/ProtocolTest.java
index eb50f83e..cc24c51c 100644
--- a/net/src/test/java/com/zfoo/net/protocol/ProtocolTest.java
+++ b/net/src/test/java/com/zfoo/net/protocol/ProtocolTest.java
@@ -18,7 +18,7 @@ import com.zfoo.net.packet.*;
 import com.zfoo.net.packet.model.DecodedPacketInfo;
 import com.zfoo.net.packet.model.SignalPacketAttachment;
 import com.zfoo.net.packet.service.IPacketService;
-import com.zfoo.protocol.ProtocolManager;
+import com.zfoo.net.packet.service.PacketService;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import org.junit.Assert;
@@ -76,7 +76,7 @@ public class ProtocolTest {
         ByteBuf writeBuff = Unpooled.directBuffer();
         packetService.write(writeBuff, cm, attachment);
 
-        writeBuff.readerIndex(ProtocolManager.PROTOCOL_HEAD_LENGTH);// 信息头的长度
+        writeBuff.readerIndex(PacketService.PACKET_HEAD_LENGTH);// 信息头的长度
 
         DecodedPacketInfo packetInfo = packetService.read(writeBuff);
 
@@ -93,7 +93,7 @@ public class ProtocolTest {
         ByteBuf writeBuff = Unpooled.buffer();
         packetService.write(writeBuff, cm, null);
 
-        writeBuff.readerIndex(ProtocolManager.PROTOCOL_HEAD_LENGTH);// 信息头的长度
+        writeBuff.readerIndex(PacketService.PACKET_HEAD_LENGTH);// 信息头的长度
 
         DecodedPacketInfo packetInfo = packetService.read(writeBuff);
 
@@ -112,7 +112,7 @@ public class ProtocolTest {
         ByteBuf writeBuff = Unpooled.buffer();
         packetService.write(writeBuff, cm, null);
 
-        writeBuff.readerIndex(ProtocolManager.PROTOCOL_HEAD_LENGTH);// 信息头的长度
+        writeBuff.readerIndex(PacketService.PACKET_HEAD_LENGTH);// 信息头的长度
 
         DecodedPacketInfo packetInfo = packetService.read(writeBuff);
 
@@ -131,7 +131,7 @@ public class ProtocolTest {
         ByteBuf writeBuff = Unpooled.buffer();
         packetService.write(writeBuff, cm, null);
 
-        writeBuff.readerIndex(ProtocolManager.PROTOCOL_HEAD_LENGTH);// 信息头的长度
+        writeBuff.readerIndex(PacketService.PACKET_HEAD_LENGTH);// 信息头的长度
 
         DecodedPacketInfo packetInfo = packetService.read(writeBuff);
 
@@ -166,7 +166,7 @@ public class ProtocolTest {
         ByteBuf writeBuff = Unpooled.buffer();
         packetService.write(writeBuff, cm, null);
 
-        writeBuff.readerIndex(ProtocolManager.PROTOCOL_HEAD_LENGTH);// 信息头的长度
+        writeBuff.readerIndex(PacketService.PACKET_HEAD_LENGTH);// 信息头的长度
 
         DecodedPacketInfo packetInfo = packetService.read(writeBuff);
 
@@ -196,7 +196,7 @@ public class ProtocolTest {
         ByteBuf writeBuff = Unpooled.buffer();
         packetService.write(writeBuff, cm, null);
 
-        writeBuff.readerIndex(ProtocolManager.PROTOCOL_HEAD_LENGTH);// 信息头的长度
+        writeBuff.readerIndex(PacketService.PACKET_HEAD_LENGTH);// 信息头的长度
 
         DecodedPacketInfo packetInfo = packetService.read(writeBuff);
 
@@ -215,7 +215,7 @@ public class ProtocolTest {
         ByteBuf writeBuff = Unpooled.buffer();
         packetService.write(writeBuff, cm, null);
 
-        writeBuff.readerIndex(ProtocolManager.PROTOCOL_HEAD_LENGTH);// 信息头的长度
+        writeBuff.readerIndex(PacketService.PACKET_HEAD_LENGTH);// 信息头的长度
 
         DecodedPacketInfo packetInfo = packetService.read(writeBuff);
 
@@ -243,7 +243,7 @@ public class ProtocolTest {
         ByteBuf writeBuff = Unpooled.buffer();
         packetService.write(writeBuff, cm, null);
 
-        writeBuff.readerIndex(ProtocolManager.PROTOCOL_HEAD_LENGTH);// 信息头的长度
+        writeBuff.readerIndex(PacketService.PACKET_HEAD_LENGTH);// 信息头的长度
 
         DecodedPacketInfo packetInfo = packetService.read(writeBuff);
 
diff --git a/protocol/src/main/java/com/zfoo/protocol/ProtocolManager.java b/protocol/src/main/java/com/zfoo/protocol/ProtocolManager.java
index 36690f3c..fd636157 100644
--- a/protocol/src/main/java/com/zfoo/protocol/ProtocolManager.java
+++ b/protocol/src/main/java/com/zfoo/protocol/ProtocolManager.java
@@ -15,13 +15,18 @@ package com.zfoo.protocol;
 import com.zfoo.protocol.buffer.ByteBufUtils;
 import com.zfoo.protocol.exception.RunException;
 import com.zfoo.protocol.generate.GenerateOperation;
-import com.zfoo.protocol.registration.*;
+import com.zfoo.protocol.registration.IProtocolRegistration;
+import com.zfoo.protocol.registration.ProtocolAnalysis;
+import com.zfoo.protocol.registration.ProtocolModule;
 import com.zfoo.protocol.util.AssertionUtils;
 import com.zfoo.protocol.xml.XmlProtocols;
 import io.netty.buffer.ByteBuf;
 
-import java.lang.reflect.*;
-import java.util.*;
+import java.lang.reflect.Field;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.Objects;
+import java.util.Set;
 
 /**
  * @author jaysunxiao
@@ -29,10 +34,6 @@ import java.util.*;
  */
 public class ProtocolManager {
 
-    /**
-     * 包体的头部的长度，一个int字节长度
-     */
-    public static final int PROTOCOL_HEAD_LENGTH = 4;
     public static final String PROTOCOL_ID = "PROTOCOL_ID";
     public static final short MAX_PROTOCOL_NUM = Short.MAX_VALUE;
     public static final byte MAX_MODULE_NUM = Byte.MAX_VALUE;
@@ -41,12 +42,14 @@ public class ProtocolManager {
     public static final IProtocolRegistration[] protocols = new IProtocolRegistration[MAX_PROTOCOL_NUM];
     public static final ProtocolModule[] modules = new ProtocolModule[MAX_MODULE_NUM];
 
-
     static {
         // 初始化默认协议模块
         modules[0] = ProtocolModule.DEFAULT_PROTOCOL_MODULE;
     }
 
+    /**
+     * 将packet序列化到buffer中
+     */
     public static void write(ByteBuf buffer, IPacket packet) {
         var protocolId = packet.protocolId();
         // 写入协议号
@@ -88,7 +91,6 @@ public class ProtocolManager {
         return moduleOptional.get();
     }
 
-
     public static synchronized void initProtocol(Set<Class<?>> protocolClassSet) {
         ProtocolAnalysis.analyze(protocolClassSet);
     }
@@ -97,7 +99,6 @@ public class ProtocolManager {
         ProtocolAnalysis.analyze(protocolClassSet,  generateOperation);
     }
 
-
     public static synchronized void initProtocol(XmlProtocols xmlProtocols, GenerateOperation generateOperation) {
         ProtocolAnalysis.analyze(xmlProtocols,  generateOperation);
     }