diff --git a/src/main/java/com/supervision/police/service/impl/ModelCaseServiceImpl.java b/src/main/java/com/supervision/police/service/impl/ModelCaseServiceImpl.java
index 5f47d0a..9e85355 100644
--- a/src/main/java/com/supervision/police/service/impl/ModelCaseServiceImpl.java
+++ b/src/main/java/com/supervision/police/service/impl/ModelCaseServiceImpl.java
@@ -3,6 +3,7 @@ package com.supervision.police.service.impl;
 import cn.hutool.core.bean.BeanUtil;
 import cn.hutool.core.bean.copier.CopyOptions;
 import cn.hutool.core.collection.CollUtil;
+import cn.hutool.core.lang.Assert;
 import cn.hutool.core.util.StrUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
@@ -171,6 +172,15 @@ public class ModelCaseServiceImpl extends ServiceImpl<ModelCaseMapper, ModelCase
     @Override
     @Transactional(transactionManager = "dataSourceTransactionManager",rollbackFor = Exception.class)
     public R<?> addPersion(CasePerson person) {
+
+        Assert.notEmpty(person.getCaseId(), "案件id不能为空");
+        Assert.notEmpty(person.getIdCard(), "身份证号不能为空");
+        Assert.notEmpty(person.getName(), "姓名不能为空");
+        Assert.notEmpty(person.getRoleCode(), "角色不能为空");
+
+        Long count = casePersonMapper.selectCount(new LambdaQueryWrapper<CasePerson>()
+                .eq(CasePerson::getCaseId, person.getCaseId()).eq(CasePerson::getIdCard, person.getIdCard()));
+        Assert.isTrue(count == 0, "该身份证号已存在");
         int i = casePersonMapper.insert(person);
         if (i > 0) {
             caseStatusManageService.whenSaveCasePeople(person.getCaseId(), person.getRoleCode());