diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/RocketMQMessageChannelBinder.java b/spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/RocketMQMessageChannelBinder.java
index 4b9d7d3f3..d92026410 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/RocketMQMessageChannelBinder.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/RocketMQMessageChannelBinder.java
@@ -16,7 +16,6 @@
 
 package com.alibaba.cloud.stream.binder.rocketmq;
 
-import com.alibaba.cloud.stream.binder.rocketmq.constant.RocketMQConst;
 import com.alibaba.cloud.stream.binder.rocketmq.custom.RocketMQBeanContainerCache;
 import com.alibaba.cloud.stream.binder.rocketmq.extend.ErrorAcknowledgeHandler;
 import com.alibaba.cloud.stream.binder.rocketmq.integration.inbound.RocketMQInboundChannelAdapter;
diff --git a/spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/integration/inbound/RocketMQConsumerFactory.java b/spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/integration/inbound/RocketMQConsumerFactory.java
index db3018145..2da415612 100644
--- a/spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/integration/inbound/RocketMQConsumerFactory.java
+++ b/spring-cloud-alibaba-starters/spring-cloud-starter-stream-rocketmq/src/main/java/com/alibaba/cloud/stream/binder/rocketmq/integration/inbound/RocketMQConsumerFactory.java
@@ -98,7 +98,7 @@ public final class RocketMQConsumerFactory {
 
 	/**
 	 * todo Compatible with versions less than 4.6 ?
-	 * @param topic
+	 * @param topic rocketmq topic
 	 * @param extendedConsumerProperties extendedConsumerProperties
 	 * @return DefaultLitePullConsumer
 	 */