diff --git a/io.sc.engine.rule.server/src/main/java/io/sc/engine/rule/server/testcase/service/impl/TestCaseParameterServiceImpl.java b/io.sc.engine.rule.server/src/main/java/io/sc/engine/rule/server/testcase/service/impl/TestCaseParameterServiceImpl.java
index a4a30867..65f2b31a 100644
--- a/io.sc.engine.rule.server/src/main/java/io/sc/engine/rule/server/testcase/service/impl/TestCaseParameterServiceImpl.java
+++ b/io.sc.engine.rule.server/src/main/java/io/sc/engine/rule/server/testcase/service/impl/TestCaseParameterServiceImpl.java
@@ -9,7 +9,6 @@ import io.sc.engine.rule.server.testcase.service.TestCaseParameterService;
 import io.sc.engine.rule.server.testcase.service.TestCaseService;
 import io.sc.engine.rule.server.testcase.wrapper.TestCaseParameterWrapper;
 import io.sc.platform.orm.service.impl.DaoServiceImpl;
-import io.sc.platform.util.CollectionUtil;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -23,6 +22,14 @@ public class TestCaseParameterServiceImpl extends DaoServiceImpl<TestCaseParamet
 	@Autowired private TestCaseService testCaseService;
 	@Autowired private TestCaseParameterBuilderFactory testCaseParameterBuilderFactory;
 
+	@Override
+	public TestCaseParameterEntity update(String s, TestCaseParameterEntity entity) throws Exception {
+		if(!StringUtils.hasText(entity.getInputValue())){
+			entity.setInputValue(null);
+		}
+		return super.update(s, entity);
+	}
+
 	@Override
 	public List<TestCaseParameterEntity> findByTestCase(String testCaseId) throws Exception {
 		return repository.findByTestCase(testCaseId);