diff --git a/VOL.Business/IServices/School/IS_StudentService.cs b/VOL.Business/IServices/School/IS_StudentService.cs
index a649615..2a4b248 100644
--- a/VOL.Business/IServices/School/IS_StudentService.cs
+++ b/VOL.Business/IServices/School/IS_StudentService.cs
@@ -91,7 +91,7 @@ namespace VOL.Business.IServices.School
         /// <param name="classId"></param>
         /// <param name="studentNo"></param>
         /// <returns></returns>
-        Task<string> UploadPhoto(IFormFile file, int gradeId, int classId, string studentNo, string studentName);
+        Task<string> UploadPhoto(IFormFile file, int gradeId, int classId, string studentNo, string? studentName);
 
         /// <summary>
         /// 批量导入学生头像
diff --git a/VOL.Business/Services/School/S_StudentService.cs b/VOL.Business/Services/School/S_StudentService.cs
index 8602f10..2093ec2 100644
--- a/VOL.Business/Services/School/S_StudentService.cs
+++ b/VOL.Business/Services/School/S_StudentService.cs
@@ -676,7 +676,7 @@ namespace VOL.Business.Services.School
         /// <summary>
         /// 上传学生头像
         /// </summary>
-        public async Task<string> UploadPhoto(IFormFile file, int gradeId, int classId, string studentNo, string studentName)
+        public async Task<string> UploadPhoto(IFormFile file, int gradeId, int classId, string studentNo, string? studentName)
         {
             const long maxFileSize = 2 * 1024 * 1024;
 
@@ -686,6 +686,17 @@ namespace VOL.Business.Services.School
                 throw new Exception("单张人脸照片大小不能超过2MB");
             if (string.IsNullOrWhiteSpace(studentNo))
                 throw new Exception("学生学号不能为空");
+
+            // 编辑时上传组件可能只传文件和学号，此时使用当前学校已有的学生姓名。
+            // 新增学生尚未入库，仍需要客户端显式传入姓名。
+            if (string.IsNullOrWhiteSpace(studentName))
+            {
+                studentName = await _studentRepository.DbContext.Set<S_Student>()
+                    .AsNoTracking()
+                    .Where(x => x.SchoolCode == UserContext.Current.TenantId && x.StudentNo == studentNo)
+                    .Select(x => x.StudentName)
+                    .FirstOrDefaultAsync();
+            }
             if (string.IsNullOrWhiteSpace(studentName))
                 throw new Exception("学生姓名不能为空");
 
diff --git a/VOL.WebApi/Controllers/Business/StudentController.cs b/VOL.WebApi/Controllers/Business/StudentController.cs
index 1d1a7ba..8fb19b9 100644
--- a/VOL.WebApi/Controllers/Business/StudentController.cs
+++ b/VOL.WebApi/Controllers/Business/StudentController.cs
@@ -179,6 +179,7 @@ namespace VOL.WebApi.Controllers.Business
         /// <param name="gradeId">年级Id</param>
         /// <param name="classId">班级Id</param>
         /// <param name="studentNo">学生学号</param>
+        /// <param name="studentName">学生姓名；编辑已有学生时可不传</param>
         /// <returns></returns>
         [HttpPost(nameof(UploadPhoto))]