diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/entity/data/AbsSlot.java b/liteflow-core/src/main/java/com/yomahub/liteflow/entity/data/AbsSlot.java
index 9d07a6e0a..299d83d36 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/entity/data/AbsSlot.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/entity/data/AbsSlot.java
@@ -112,7 +112,7 @@ public abstract class AbsSlot implements Slot {
 		this.executeSteps.add(step);
 	}
 
-	public void printStep(){
+	public String printStep(){
 		StringBuffer str = new StringBuffer();
 		CmpStep cmpStep = null;
 		for (Iterator<CmpStep> it = executeSteps.iterator(); it.hasNext();) {
@@ -123,6 +123,7 @@ public abstract class AbsSlot implements Slot {
 			}
 		}
 		LOG.info("[{}]:CHAIN_NAME[{}]\n{}",getRequestId(),this.getChainName(),str.toString());
+		return str.toString();
 	}
 
 	@Override
diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/entity/data/Slot.java b/liteflow-core/src/main/java/com/yomahub/liteflow/entity/data/Slot.java
index ab917ecf7..9f91e770d 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/entity/data/Slot.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/entity/data/Slot.java
@@ -42,7 +42,7 @@ public interface Slot {
 
 	public void addStep(CmpStep step);
 
-	public void printStep();
+	public String printStep();
 
 	public void generateRequestId();