diff --git a/src/META-INF/application-template.xml b/src/META-INF/application-template.xml
index d0525f7b4..a5d8aeedf 100644
--- a/src/META-INF/application-template.xml
+++ b/src/META-INF/application-template.xml
@@ -119,7 +119,7 @@
         threads： 线程数， 默认: CPU核数*32
         maxconns：最大连接数, 小于1表示无限制， 默认: 0
         maxbody: request.body最大值， 默认: 64K
-        bufferCapacity: ByteBuffer的初始化大小， 默认: 32K;  (HTTP 2.0、WebSocket，必须要16k以上)
+        bufferCapacity: ByteBuffer的初始化大小， TCP默认: 32K;  (HTTP 2.0、WebSocket，必须要16k以上); UDP默认: 1480B
         bufferPoolSize： ByteBuffer池的大小，默认: 线程数*4
         responsePoolSize： Response池的大小，默认: 线程数*2
         aliveTimeoutSeconds: KeepAlive读操作超时秒数， 默认30， 0表示永久不超时; -1表示禁止KeepAlive
diff --git a/src/org/redkale/net/Server.java b/src/org/redkale/net/Server.java
index 966ed90ed..1530be2e9 100644
--- a/src/org/redkale/net/Server.java
+++ b/src/org/redkale/net/Server.java
@@ -127,8 +127,8 @@ public abstract class Server<K extends Serializable, C extends Context, R extend
         this.writeTimeoutSeconds = config.getIntValue("writeTimeoutSeconds", 0);
         this.backlog = parseLenth(config.getValue("backlog"), 8 * 1024);
         this.maxbody = parseLenth(config.getValue("maxbody"), 64 * 1024);
-        int bufCapacity = parseLenth(config.getValue("bufferCapacity"), 32 * 1024);
-        this.bufferCapacity = bufCapacity < 8 * 1024 ? 8 * 1024 : bufCapacity;
+        int bufCapacity = parseLenth(config.getValue("bufferCapacity"), "UDP".equalsIgnoreCase(protocol) ? 1480 : 32 * 1024);
+        this.bufferCapacity = "UDP".equalsIgnoreCase(protocol) ? bufCapacity : (bufCapacity < 8 * 1024 ? 8 * 1024 : bufCapacity);
         this.threads = config.getIntValue("threads", Runtime.getRuntime().availableProcessors() * 32);
         this.bufferPoolSize = config.getIntValue("bufferPoolSize", this.threads * 4);
         this.responsePoolSize = config.getIntValue("responsePoolSize", this.threads * 2);