diff --git a/jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/extbpm/process/common/expression/FlowNodeExpression.java b/jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/extbpm/process/common/expression/FlowNodeExpression.java
index 301572a..492f442 100644
--- a/jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/extbpm/process/common/expression/FlowNodeExpression.java
+++ b/jeecg-boot-platform/jeecg-boot-module-bpm-flowable/src/main/java/org/jeecg/modules/extbpm/process/common/expression/FlowNodeExpression.java
@@ -1,5 +1,6 @@
 package org.jeecg.modules.extbpm.process.common.expression;
 
+import com.alibaba.fastjson.JSONObject;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang.StringUtils;
 import org.jeecg.common.constant.SymbolConstant;
@@ -9,7 +10,6 @@ import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;
 import org.springframework.util.CollectionUtils;
 
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
 
@@ -35,6 +35,37 @@ public class FlowNodeExpression {
         return users;
     }
 
+    /**
+     * 根据字段名称取json_data查询对应业务表单的数据
+     * ${flowNodeExpression.getJsondatastring(jsonData,'supDeptleaderid')}
+     * @param jsonData
+     * @param codeName
+     * @return
+     */
+    public String getJsondatastring(Object jsonData, String codeName){
+        if (jsonData == null || StringUtils.isBlank(codeName)) {
+            return null;
+        }
+
+        try {
+            JSONObject data;
+            if (jsonData instanceof JSONObject) {
+                data = (JSONObject) jsonData;
+            } else if (jsonData instanceof String) {
+                if (StringUtils.isBlank((String) jsonData)) {
+                    return null;
+                }
+                data = JSONObject.parseObject((String) jsonData);
+            } else {
+                data = JSONObject.parseObject(JSONObject.toJSONString(jsonData));
+            }
+            return data == null ? null : data.getString(codeName);
+        } catch (Exception e) {
+            log.warn("getJsondata parse failed, codeName={}, jsonData={}", codeName, jsonData, e);
+            return null;
+        }
+    }
+
     /**
      * 查找上一级部门负责人
      * ${flowNodeExpression.getLevel1DepartLeaders(applyUserId)}