diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/flow/element/Chain.java b/liteflow-core/src/main/java/com/yomahub/liteflow/flow/element/Chain.java
index eac1474c9..5bce26970 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/flow/element/Chain.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/flow/element/Chain.java
@@ -9,34 +9,16 @@
 package com.yomahub.liteflow.flow.element;
 
 import cn.hutool.core.collection.CollUtil;
-import cn.hutool.core.util.StrUtil;
 import com.yomahub.liteflow.exception.ChainEndException;
-import com.yomahub.liteflow.flow.FlowBus;
 import com.yomahub.liteflow.slot.DataBus;
 import com.yomahub.liteflow.slot.Slot;
-import com.yomahub.liteflow.flow.parallel.CompletableFutureTimeout;
-import com.yomahub.liteflow.flow.parallel.ParallelSupplier;
-import com.yomahub.liteflow.flow.parallel.WhenFutureObj;
-import com.yomahub.liteflow.enums.ConditionTypeEnum;
 import com.yomahub.liteflow.enums.ExecuteTypeEnum;
 import com.yomahub.liteflow.exception.FlowSystemException;
-import com.yomahub.liteflow.exception.WhenExecuteException;
 import com.yomahub.liteflow.flow.element.condition.Condition;
-import com.yomahub.liteflow.flow.element.condition.ThenCondition;
-import com.yomahub.liteflow.flow.element.condition.WhenCondition;
-import com.yomahub.liteflow.property.LiteflowConfig;
-import com.yomahub.liteflow.property.LiteflowConfigGetter;
-import com.yomahub.liteflow.thread.ExecutorHelper;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.TimeUnit;
-import java.util.stream.Collectors;
 
 /**
  * chain对象，实现可执行器