diff --git a/backend/IM_API/Controllers/GroupController.cs b/backend/IM_API/Controllers/GroupController.cs
index 066bd10..35476ed 100644
--- a/backend/IM_API/Controllers/GroupController.cs
+++ b/backend/IM_API/Controllers/GroupController.cs
@@ -88,5 +88,13 @@ namespace IM_API.Controllers
             var groupinfo = await _groupService.UpdateGroupInfoAsync(int.Parse(useridStr), groupId, dto);
             return Ok(new BaseResponse<GroupInfoVo>(groupinfo));
         }
+
+        [HttpGet]
+        [ProducesResponseType(typeof(BaseResponse<GroupInfoVo>), StatusCodes.Status200OK)]
+        public async Task<IActionResult> GetGroupInfo([FromQuery]int groupId)
+        {
+            var group = await _groupService.GetGroupInfoAsync(groupId);
+            return Ok(new BaseResponse<GroupInfoVo>(group));
+        }
     }
 }
diff --git a/backend/IM_API/Interface/Services/IGroupService.cs b/backend/IM_API/Interface/Services/IGroupService.cs
index 95e7242..55ed4b0 100644
--- a/backend/IM_API/Interface/Services/IGroupService.cs
+++ b/backend/IM_API/Interface/Services/IGroupService.cs
@@ -53,6 +53,8 @@ namespace IM_API.Interface.Services
         Task MakeGroupRequestAsync(int userId,int? adminUserId,int groupId);
         Task MakeGroupMemberAsync(int userId, int groupId, GroupMemberRole? role);
         Task<List<GroupMemberVo>> GetGroupMembers(int userId, int groupId);
-        Task<GroupInfoVo> UpdateGroupInfoAsync(int userId, int groupId, GroupUpdateDto updateDto); 
+        Task<GroupInfoVo> UpdateGroupInfoAsync(int userId, int groupId, GroupUpdateDto updateDto);
+
+        Task<GroupInfoVo> GetGroupInfoAsync(int groupId);
     }
 }
diff --git a/backend/IM_API/Services/GroupService.cs b/backend/IM_API/Services/GroupService.cs
index 036896a..b784623 100644
--- a/backend/IM_API/Services/GroupService.cs
+++ b/backend/IM_API/Services/GroupService.cs
@@ -292,5 +292,15 @@ namespace IM_API.Services
 
             return _mapper.Map<GroupInfoVo>(groupInfo);
         }
+
+        public async Task<GroupInfoVo> GetGroupInfoAsync(int groupId)
+        {
+            var groupInfo = await _context.Groups.FirstOrDefaultAsync(x => x.Id == groupId);
+
+            if (groupInfo is null)
+                throw new BaseException(CodeDefine.GROUP_NOT_FOUND);
+
+            return _mapper.Map<GroupInfoVo>(groupInfo);
+        }
     }
 }
diff --git a/frontend/pc/IM/src/renderer/src/components/messages/InfoSidebar.vue b/frontend/pc/IM/src/renderer/src/components/messages/InfoSidebar.vue
index c536b16..4b4ac26 100644
--- a/frontend/pc/IM/src/renderer/src/components/messages/InfoSidebar.vue
+++ b/frontend/pc/IM/src/renderer/src/components/messages/InfoSidebar.vue
@@ -79,6 +79,10 @@ import { MESSAGE_TYPE } from '../../constants/MessageType';
 import feather from 'feather-icons';
 import { GROUP_MEMBER_ROLE } from '../../constants/GroupDefine';
 import { uploadService } from '../../services/upload/uploadService';
+import { groupService } from '../../services/group';
+import { SYSTEM_BASE_STATUS } from '../../constants/systemBaseStatus';
+import { useMessage } from './useAlert';
+import { getFileHash } from '../../utils/uploadTools';
 
 const props = defineProps({
   chatType: {
@@ -105,6 +109,8 @@ const props = defineProps({
 
 const input = useTemplateRef('input')
 
+const message = useMessage();
+
 defineEmits(['close', 'viewAll']);
 
 const uploadGroupAvatar = () => {
@@ -113,7 +119,17 @@ const uploadGroupAvatar = () => {
 
 const fileUploadHandler = async (e) => {
   const file = e.target.files[0];
-  const { data } = await uploadService.uploadSmallFile(file);
+  const hash = getFileHash(file)
+  const { data } = await uploadService.uploadSmallFile(file, hash);
+  const res = await groupService.updateGroupInfo(props.groupData.targetId, {
+    avatar: data.url
+  })
+
+  if(res.code == SYSTEM_BASE_STATUS.SUCCESS){
+    message.success('头像更新成功')
+  }else{
+    message.error(res.message)
+  }
 }
 
 // 判断当前用户是否为管理员
diff --git a/frontend/pc/IM/src/renderer/src/services/group.js b/frontend/pc/IM/src/renderer/src/services/group.js
index a69d2f6..d6dfdba 100644
--- a/frontend/pc/IM/src/renderer/src/services/group.js
+++ b/frontend/pc/IM/src/renderer/src/services/group.js
@@ -12,5 +12,14 @@ export const groupService = {
      * @param {*} groupId
      * @returns
      */
-    getGroupMember: (groupId) => request.get(`/Group/GetGroupMembers?groupId=${groupId}`)
+    getGroupMember: (groupId) => request.get(`/Group/GetGroupMembers?groupId=${groupId}`),
+
+    /**
+     * 更新群组信息
+     * @param {*} groupId
+     * @param {*} params
+     * @returns
+     */
+
+    updateGroupInfo: (groupId, params) => request.post(`/Group/UpdateGroup?groupId=${groupId}`, params)
 }