diff --git a/src/main/java/com/alibaba/druid/pool/vendor/PGValidConnectionChecker.java b/src/main/java/com/alibaba/druid/pool/vendor/PGValidConnectionChecker.java
index 73f00c7577..881ba8b618 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/PGValidConnectionChecker.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/PGValidConnectionChecker.java
@@ -15,17 +15,17 @@
  */
 package com.alibaba.druid.pool.vendor;
 
-import java.io.Serializable;
-import java.sql.Connection;
-import java.sql.ResultSet;
-import java.sql.Statement;
-
 import com.alibaba.druid.pool.DruidPooledConnection;
 import com.alibaba.druid.pool.ValidConnectionChecker;
 import com.alibaba.druid.pool.ValidConnectionCheckerAdapter;
 import com.alibaba.druid.proxy.jdbc.ConnectionProxy;
 import com.alibaba.druid.util.JdbcUtils;
 
+import java.io.Serializable;
+import java.sql.Connection;
+import java.sql.ResultSet;
+import java.sql.Statement;
+
 public class PGValidConnectionChecker extends ValidConnectionCheckerAdapter implements ValidConnectionChecker, Serializable {
 
     private static final long serialVersionUID     = -2227528634302168877L;
@@ -61,7 +61,10 @@ public class PGValidConnectionChecker extends ValidConnectionCheckerAdapter impl
         ResultSet rs = null;
         try {
             stmt = conn.createStatement();
-            stmt.setQueryTimeout(queryTimeout);
+            if(queryTimeout>=0){
+                //pgsql Driver 9.0以及以下版本不支持setQueryTimeout，可通过设置queryTimeout<0兼容低版本
+                stmt.setQueryTimeout(queryTimeout);
+            }
             rs = stmt.executeQuery(validateQuery);
             return true;
         } finally {