diff --git a/codestyle/checkstyle.xml b/codestyle/checkstyle.xml
index f721d510d4c..fa4d735a785 100644
--- a/codestyle/checkstyle.xml
+++ b/codestyle/checkstyle.xml
@@ -20,6 +20,7 @@
         <module name="NoLineWrap"/>
         <module name="OuterTypeFilename"/>
         <module name="UnusedImports"/>
+        <module name="RedundantImport"/>
 
         <!--<module name="CustomImportOrder">-->
         <!--<property name="specialImportsRegExp" value="org.apache.dubbo.*"/>-->
diff --git a/dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/AbstractInterfaceConfig.java b/dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/AbstractInterfaceConfig.java
index 3ba300c8a80..4899d5a7842 100644
--- a/dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/AbstractInterfaceConfig.java
+++ b/dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/AbstractInterfaceConfig.java
@@ -29,7 +29,6 @@
 import org.apache.dubbo.common.utils.StringUtils;
 import org.apache.dubbo.common.utils.UrlUtils;
 import org.apache.dubbo.config.context.ConfigManager;
-import org.apache.dubbo.common.utils.CollectionUtils;
 import org.apache.dubbo.config.support.Parameter;
 import org.apache.dubbo.configcenter.DynamicConfiguration;
 import org.apache.dubbo.configcenter.DynamicConfigurationFactory;
diff --git a/dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/ServiceConfig.java b/dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/ServiceConfig.java
index 3a85ac8b274..51962d6b679 100644
--- a/dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/ServiceConfig.java
+++ b/dubbo-config/dubbo-config-api/src/main/java/org/apache/dubbo/config/ServiceConfig.java
@@ -27,7 +27,6 @@
 import org.apache.dubbo.common.utils.ConfigUtils;
 import org.apache.dubbo.common.utils.NamedThreadFactory;
 import org.apache.dubbo.common.utils.StringUtils;
-import org.apache.dubbo.common.utils.CollectionUtils;
 import org.apache.dubbo.config.annotation.Service;
 import org.apache.dubbo.config.context.ConfigManager;
 import org.apache.dubbo.config.invoker.DelegateProviderMetaDataInvoker;