diff --git a/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java b/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java
index b2c1201..676e8f6 100644
--- a/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java
+++ b/src/main/java/com/sunyard/sge/database/pool/SydApiPool.java
@@ -42,11 +42,12 @@ public class SydApiPool extends ThreadBasedConnectPool<SydApi> {
 
     // 保活接口
     protected boolean check(SydApi o) {
-        return null != o;
+        null != o;
     }
 
     // 释放
     protected void free(SydApi o) {
+        o.SYD_Disconnect_Ex();
     }
 
 }
diff --git a/说明.txt b/说明.txt
index 3047bab..13eb7e6 100644
--- a/说明.txt
+++ b/说明.txt
@@ -5,7 +5,6 @@
     - dependences 所有依赖
         - groovy-all-2.3.2 通信协议支持
         - proto-1.0-20220412 通信协议支持
-        - slf4j-api-1.7.10 日志接口
         - log4j-api-2.17.0.jar 日志接口
         - log4j-core-2.17.0.jar 日志核心包
         - log4j-slf4j-impl-2.17.0.jar 日志桥接