diff --git a/src/main/java/yi/master/business/testconfig/bean/GlobalVariable.java b/src/main/java/yi/master/business/testconfig/bean/GlobalVariable.java
index fbc93bfb1bcda8bbafe0293aec5962e2b4393dc4..d0ef7412ded75b74b50db74a8391925780989d36 100644
--- a/src/main/java/yi/master/business/testconfig/bean/GlobalVariable.java
+++ b/src/main/java/yi/master/business/testconfig/bean/GlobalVariable.java
@@ -23,6 +23,7 @@ import java.io.IOException;
 import java.io.Serializable;
 import java.sql.Timestamp;
 import java.util.Date;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -262,7 +263,7 @@ public class GlobalVariable implements Serializable {
             && !GlobalVariableType.fileParameter.name().equalsIgnoreCase(this.variableType)) {
 			return mapper.readValue(this.value, Map.class);
 		}
-		return null;
+		return new HashMap<>();
 	}
 	
 	private void update() {