diff --git a/backend/app/api/endpoints/meetings.py b/backend/app/api/endpoints/meetings.py
index 7e5405d..623707f 100644
--- a/backend/app/api/endpoints/meetings.py
+++ b/backend/app/api/endpoints/meetings.py
@@ -1175,6 +1175,16 @@ def get_meeting_preview_data(meeting_id: int, password: Optional[str] = None):
                 cursor.execute(attendees_query, (meeting_id,))
                 attendees_data = cursor.fetchall()
                 attendees = [{'user_id': row['user_id'], 'caption': row['caption']} for row in attendees_data]
+                cursor.execute(
+                    '''
+                        SELECT COUNT(DISTINCT speaker_id) AS participant_count
+                        FROM transcript_segments
+                        WHERE meeting_id = %s AND speaker_id IS NOT NULL
+                    ''',
+                    (meeting_id,)
+                )
+                speaker_count_row = cursor.fetchone() or {}
+                participant_count = speaker_count_row.get('participant_count') or len(attendees)
                 tags = _process_tags(cursor, meeting.get('tags'))
 
             # 组装返回数据
@@ -1187,7 +1197,7 @@ def get_meeting_preview_data(meeting_id: int, password: Optional[str] = None):
                 "prompt_id": meeting['prompt_id'],
                 "prompt_name": meeting['prompt_name'],
                 "attendees": attendees,
-                "attendees_count": len(attendees),
+                "attendees_count": participant_count,
                 "tags": tags,
                 "has_password": bool(meeting.get('access_password')),
                 "processing_status": progress_info  # 附带进度信息供调试