diff --git a/src/main/java/com/glxp/mipsdl/client/hlfyyy/HlfyyyClient.java b/src/main/java/com/glxp/mipsdl/client/hlfyyy/HlfyyyClient.java
index f20b12a..d57929a 100644
--- a/src/main/java/com/glxp/mipsdl/client/hlfyyy/HlfyyyClient.java
+++ b/src/main/java/com/glxp/mipsdl/client/hlfyyy/HlfyyyClient.java
@@ -20,6 +20,7 @@ import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.core.toolkit.StringUtils;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.fasterxml.jackson.databind.JsonNode;
 import com.glxp.mipsdl.client.CommonHttpClient;
 
 import com.glxp.mipsdl.client.hlfyyy.entity.InvCodeResultEntity;
@@ -2394,6 +2395,12 @@ public class HlfyyyClient extends CommonHttpClient {
     private static final String WSDL_URL = "http://192.168.158.208:8152/ZoesoftHipService.asmx?WSDL";
 
     public BaseResponse callInterface(String msgHeader, String msgBody)  {
+        // 先将JSON字符串转为Map
+        Map<String, Object> map = JSONUtil.toBean(msgBody, Map.class);
+        // 遍历Map将所有值转换为字符串
+        map.replaceAll((key, value) -> value == null? null : value.toString());
+        // 再将转换后的Map转回JSON字符串（此时所有值都已是字符串类型）
+        msgBody = JSONUtil.toJsonStr(map);
         String xml = "\n" +
                 "<soap:Envelope\n" +
                 "    xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"\n" +