diff --git a/src/test/java/com/example/catchTheLetters/PasswordChangeTest.java b/src/test/java/com/example/catchTheLetters/PasswordChangeTest.java
new file mode 100644
index 0000000..331aa3e
--- /dev/null
+++ b/src/test/java/com/example/catchTheLetters/PasswordChangeTest.java
@@ -0,0 +1,33 @@
+package com.example.catchTheLetters;
+
+import com.example.catchTheLetters.entity.User;
+import jakarta.annotation.Resource;
+import com.example.catchTheLetters.utils.DESUtil;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.data.mongodb.core.MongoTemplate;
+
+@SpringBootTest
+public class PasswordChangeTest {
+    @Resource
+    private MongoTemplate mongoTemplate;
+
+    @Resource
+    private DESUtil desUtil;
+
+    @Disabled
+    @Test
+    void testChangePassword() {
+        // 查出所有用户
+        var users = mongoTemplate.findAll(User.class);
+        for (var user : users) {
+            // 对密码进行加密
+            var password = user.getPassword();
+            var newPassword = desUtil.SHA512(password);
+            user.setPassword(newPassword);
+            // 保存
+            mongoTemplate.save(user);
+        }
+    }
+}