diff --git a/rpc-client/src/main/java/com/antgroup/tugraph/TuGraphDbRpcClient.java b/rpc-client/src/main/java/com/antgroup/tugraph/TuGraphDbRpcClient.java
index 92be758..7891792 100644
--- a/rpc-client/src/main/java/com/antgroup/tugraph/TuGraphDbRpcClient.java
+++ b/rpc-client/src/main/java/com/antgroup/tugraph/TuGraphDbRpcClient.java
@@ -363,6 +363,7 @@ private static class TuGraphSingleRpcClient {
 
         public TuGraphSingleRpcClient(String url, String user, String pass) {
             RpcClientOptions options = new RpcClientOptions();
+            options.setMaxTotalConnections(1000);
             options.setProtocolType(Options.ProtocolType.PROTOCOL_BAIDU_STD_VALUE);
             options.setLoadBalanceType(LoadBalanceStrategy.LOAD_BALANCE_FAIR);
             options.setWriteTimeoutMillis(TIMEOUTINMS);