diff --git a/backend/competition/judge_views.py b/backend/competition/judge_views.py
index fc248d0..47fbf90 100644
--- a/backend/competition/judge_views.py
+++ b/backend/competition/judge_views.py
@@ -435,6 +435,19 @@ def project_detail_api(request, project_id):
     # 判断是否为选手查看自己的项目
     is_own_project = role == 'contestant' and project.contestant.user == user
     
+    # 获取项目文件（PPT、PDF等）
+    project_files = ProjectFile.objects.filter(project=project)
+    files_data = []
+    for f in project_files:
+        file_url = f.file.url if f.file else f.file_url
+        if file_url:
+            files_data.append({
+                'id': f.id,
+                'name': f.name,
+                'file_type': f.file_type,
+                'file_url': file_url
+            })
+    
     data = {
         'id': project.id,
         'title': project.title,
@@ -445,6 +458,7 @@ def project_detail_api(request, project_id):
         'current_comment': current_comment,
         'ai_result': ai_data,
         'audio_url': audio_url,
+        'files': files_data,
         'can_grade': role == 'judge' or (role == 'contestant' and project.contestant.user != user),
         'is_own_project': is_own_project,
         # 评分细项（评委、嘉宾可见，选手查看自己的项目时也可见）
diff --git a/backend/competition/serializers.py b/backend/competition/serializers.py
index 689884a..e220480 100644
--- a/backend/competition/serializers.py
+++ b/backend/competition/serializers.py
@@ -33,19 +33,44 @@ class CompetitionEnrollmentSerializer(serializers.ModelSerializer):
         read_only_fields = ['status']
 
 class ProjectFileSerializer(serializers.ModelSerializer):
+    file_url_display = serializers.SerializerMethodField()
+    
     class Meta:
         model = ProjectFile
-        fields = ['id', 'project', 'file_type', 'file', 'file_url', 'name', 'created_at']
+        fields = ['id', 'project', 'file_type', 'file', 'file_url', 'name', 'created_at', 'file_url_display']
+
+    def get_file_url_display(self, obj):
+        if obj.file:
+            return obj.file.url
+        return obj.file_url
 
     def validate_file(self, value):
         if not value:
             return value
-        # 50MB limit
         limit_mb = 50
         if value.size > limit_mb * 1024 * 1024:
             raise serializers.ValidationError(f"文件大小不能超过 {limit_mb}MB")
         return value
 
+    def create(self, validated_data):
+        file_obj = validated_data.get('file')
+        if file_obj:
+            ext = file_obj.name.split('.')[-1].lower() if '.' in file_obj.name else ''
+            if ext in ['ppt', 'pptx']:
+                validated_data['file_type'] = 'ppt'
+            elif ext == 'pdf':
+                validated_data['file_type'] = 'pdf'
+            elif ext in ['jpg', 'jpeg', 'png', 'gif', 'webp']:
+                validated_data['file_type'] = 'image'
+            elif ext in ['mp4', 'mov', 'avi', 'webm']:
+                validated_data['file_type'] = 'video'
+            elif ext in ['doc', 'docx']:
+                validated_data['file_type'] = 'doc'
+            
+            if not validated_data.get('name'):
+                validated_data['name'] = file_obj.name
+        return super().create(validated_data)
+
 class ProjectSerializer(serializers.ModelSerializer):
     files = ProjectFileSerializer(many=True, read_only=True)
     contestant_info = serializers.SerializerMethodField()
diff --git a/backend/competition/templates/judge/dashboard.html b/backend/competition/templates/judge/dashboard.html
index d2112fb..efc61b5 100644
--- a/backend/competition/templates/judge/dashboard.html
+++ b/backend/competition/templates/judge/dashboard.html
@@ -116,6 +116,13 @@
                         </div>
                     </div>
                     
+                    <div id="modalFilesSection" style="display: none;">
+                        <h4 class="text-lg font-semibold text-gray-900 mb-3 flex items-center"><i class="fas fa-file-powerpoint mr-2 text-orange-500"></i>项目文件</h4>
+                        <div id="modalFilesList" class="bg-gray-50 p-4 rounded-lg border border-gray-100 space-y-2">
+                            <!-- Files will be injected here -->
+                        </div>
+                    </div>
+                    
                     <div id="aiResultSection" style="display:none;" class="border border-indigo-100 rounded-xl overflow-hidden">
                         <div class="bg-indigo-50 px-4 py-3 border-b border-indigo-100 flex items-center">
                             <i class="fas fa-robot text-indigo-600 mr-2"></i>
@@ -548,6 +555,39 @@ async function viewProject(id) {
             audioSection.classList.add('justify-center');
         }
         
+        // Render Project Files (PPT/PDF)
+        const filesSection = document.getElementById('modalFilesSection');
+        const filesList = document.getElementById('modalFilesList');
+        if (data.files && data.files.length > 0) {
+            filesSection.style.display = 'block';
+            filesList.innerHTML = data.files.map(file => {
+                let iconClass = 'fas fa-file';
+                let iconColor = 'text-gray-500';
+                if (file.file_type === 'ppt' || file.file_type === 'pptx') {
+                    iconClass = 'fas fa-file-powerpoint';
+                    iconColor = 'text-orange-500';
+                } else if (file.file_type === 'pdf') {
+                    iconClass = 'fas fa-file-pdf';
+                    iconColor = 'text-red-500';
+                } else if (file.file_type === 'video') {
+                    iconClass = 'fas fa-video';
+                    iconColor = 'text-purple-500';
+                } else if (file.file_type === 'image') {
+                    iconClass = 'fas fa-image';
+                    iconColor = 'text-green-500';
+                }
+                return `
+                    <a href="${file.file_url}" target="_blank" class="flex items-center p-3 bg-white rounded-lg border border-gray-200 hover:bg-gray-50 hover:border-blue-300 transition-colors group">
+                        <i class="${iconClass} ${iconColor} text-xl mr-3 group-hover:scale-110 transition-transform"></i>
+                        <span class="flex-1 text-sm font-medium text-gray-700 truncate">${file.name || '未命名文件'}</span>
+                        <i class="fas fa-external-link-alt text-gray-400 group-hover:text-blue-500"></i>
+                    </a>
+                `;
+            }).join('');
+        } else {
+            filesSection.style.display = 'none';
+        }
+        
         // AI Result
         const aiSection = document.getElementById('aiResultSection');
         if (data.ai_result) {
diff --git a/backend/competition/views.py b/backend/competition/views.py
index 86096bf..bf8ed7c 100644
--- a/backend/competition/views.py
+++ b/backend/competition/views.py
@@ -10,6 +10,7 @@ from .serializers import (
     ProjectSerializer, ProjectFileSerializer, 
     ScoreSerializer, CommentSerializer, ScoreDimensionSerializer
 )
+import uuid
 
 from rest_framework.pagination import PageNumberPagination
 
@@ -200,13 +201,26 @@ class ProjectFileViewSet(viewsets.ModelViewSet):
         return ProjectFile.objects.all()
         
     def perform_create(self, serializer):
-        # 简单权限控制：只有项目拥有者可以上传
         project = serializer.validated_data['project']
         user = get_current_wechat_user(self.request)
         
         if not user or project.contestant.user != user:
             raise serializers.ValidationError("无权上传文件")
-            
+        
+        file_obj = serializer.validated_data.get('file')
+        if file_obj:
+            try:
+                from ai_services.services import AliyunTingwuService
+                service = AliyunTingwuService()
+                if service.bucket:
+                    ext = file_obj.name.split('.')[-1] if '.' in file_obj.name else ''
+                    file_name = f"competitions/projects/{project.id}/{uuid.uuid4()}.{ext}"
+                    oss_url = service.upload_to_oss(file_obj, file_name, day=30)
+                    serializer.save(file_url=oss_url, file=None)
+                    return
+            except Exception as e:
+                print(f"OSS upload failed, using local storage: {e}")
+        
         serializer.save()
 
 
diff --git a/frontend/src/components/competition/ProjectSubmission.jsx b/frontend/src/components/competition/ProjectSubmission.jsx
index f641ea7..101bd76 100644
--- a/frontend/src/components/competition/ProjectSubmission.jsx
+++ b/frontend/src/components/competition/ProjectSubmission.jsx
@@ -146,11 +146,43 @@ const ProjectSubmission = ({ competitionId, initialValues, onCancel, onSuccess }
         
         {/* File Upload Section - Only visible if project exists */}
         {initialValues?.id && (
-            <Form.Item label="项目附件 (PPT/PDF/视频)">
+            <Form.Item label="项目附件 (PPT/PDF/视频/图片)">
                 <Upload 
                     customRequest={handleUpload}
                     listType="picture"
                     maxCount={5}
+                    accept=".ppt,.pptx,.pdf,.mp4,.mov,.avi,.webm,.jpg,.jpeg,.png,.gif,.webp,.doc,.docx"
+                    beforeUpload={(file) => {
+                        const allowedTypes = [
+                            'application/vnd.ms-powerpoint',
+                            'application/vnd.openxmlformats-officedocument.presentationml.presentation',
+                            'application/pdf',
+                            'video/mp4',
+                            'video/quicktime',
+                            'video/x-msvideo',
+                            'video/webm',
+                            'image/jpeg',
+                            'image/png',
+                            'image/gif',
+                            'image/webp',
+                            'application/msword',
+                            'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
+                        ];
+                        const allowedExtensions = ['ppt', 'pptx', 'pdf', 'mp4', 'mov', 'avi', 'webm', 'jpg', 'jpeg', 'png', 'gif', 'webp', 'doc', 'docx'];
+                        const fileExt = file.name.split('.').pop()?.toLowerCase();
+                        
+                        if (!allowedExtensions.includes(fileExt)) {
+                            message.error('不支持的文件格式！请上传 PPT、PDF、视频或图片文件');
+                            return Upload.LIST_IGNORE;
+                        }
+                        
+                        const isLt50M = file.size / 1024 / 1024 < 50;
+                        if (!isLt50M) {
+                            message.error('文件大小不能超过 50MB');
+                            return Upload.LIST_IGNORE;
+                        }
+                        return false;
+                    }}
                 >
                     <Button icon={<CloudUploadOutlined />}>上传文件 (最大50MB)</Button>
                 </Upload>