diff --git a/ETL/L1A.py b/ETL/L1A.py
index 37c42ed..bcc6d6d 100644
--- a/ETL/L1A.py
+++ b/ETL/L1A.py
@@ -2,6 +2,7 @@ import os
 import json
 import sqlite3
 import glob
+import argparse  # Added
 
 # Paths
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
@@ -26,17 +27,33 @@ def init_db():
     return conn
 
 def process_files():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--force', action='store_true', help='Force reprocessing of all files')
+    args = parser.parse_args()
+
     conn = init_db()
     cursor = conn.cursor()
     
+    # Get existing match_ids to skip
+    existing_ids = set()
+    if not args.force:
+        try:
+            cursor.execute("SELECT match_id FROM raw_iframe_network")
+            existing_ids = set(row[0] for row in cursor.fetchall())
+            print(f"Found {len(existing_ids)} existing matches in DB. Incremental mode active.")
+        except Exception as e:
+            print(f"Error checking existing data: {e}")
+
     # Pattern to match all iframe_network.json files
     # output_arena/*/iframe_network.json
     pattern = os.path.join(OUTPUT_ARENA_DIR, '*', 'iframe_network.json')
     files = glob.glob(pattern)
     
-    print(f"Found {len(files)} files to process.")
+    print(f"Found {len(files)} files in directory.")
     
     count = 0
+    skipped = 0
+    
     for file_path in files:
         try:
             # Extract match_id from directory name
@@ -44,6 +61,10 @@ def process_files():
             parent_dir = os.path.dirname(file_path)
             match_id = os.path.basename(parent_dir)
             
+            if match_id in existing_ids:
+                skipped += 1
+                continue
+
             with open(file_path, 'r', encoding='utf-8') as f:
                 content = f.read()
             
@@ -63,7 +84,7 @@ def process_files():
             
     conn.commit()
     conn.close()
-    print(f"Finished processing {count} files.")
+    print(f"Finished. Processed: {count}, Skipped: {skipped}.")
 
 if __name__ == '__main__':
-    process_files()
+    process_files()
\ No newline at end of file
diff --git a/ETL/verify/clean_dirty_data.py b/ETL/verify/clean_dirty_data.py
new file mode 100644
index 0000000..60280d5
--- /dev/null
+++ b/ETL/verify/clean_dirty_data.py
@@ -0,0 +1,39 @@
+import sqlite3
+import os
+
+# 路径指向正式数据库
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+DB_PATH = os.path.join(BASE_DIR, 'database', 'L1A', 'L1A.sqlite')
+
+def clean_db():
+    if not os.path.exists(DB_PATH):
+        print(f"Database not found at {DB_PATH}")
+        return
+
+    print(f"Connecting to production DB: {DB_PATH}")
+    conn = sqlite3.connect(DB_PATH)
+    cursor = conn.cursor()
+
+    # 查找脏数据 (假设模拟数据的 match_id 是 match_001, match_002, match_003)
+    dirty_ids = ['match_001', 'match_002', 'match_003']
+    
+    # 也可以用 LIKE 'match_%' 如果您想删得更彻底，但要小心误删
+    # 这里我们精准删除
+    
+    deleted_count = 0
+    for mid in dirty_ids:
+        cursor.execute("DELETE FROM raw_iframe_network WHERE match_id = ?", (mid,))
+        if cursor.rowcount > 0:
+            print(f"Deleted dirty record: {mid}")
+            deleted_count += 1
+    
+    conn.commit()
+    conn.close()
+    
+    if deleted_count > 0:
+        print(f"Cleanup complete. Removed {deleted_count} dirty records.")
+    else:
+        print("Cleanup complete. No dirty records found.")
+
+if __name__ == "__main__":
+    clean_db()
\ No newline at end of file
diff --git a/ETL/verify/setup_test_data.py b/ETL/verify/setup_test_data.py
new file mode 100644
index 0000000..0641b87
--- /dev/null
+++ b/ETL/verify/setup_test_data.py
@@ -0,0 +1,35 @@
+import os
+import json
+
+# 定义路径
+CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
+PROJECT_ROOT = os.path.dirname(os.path.dirname(CURRENT_DIR))
+OUTPUT_ARENA_DIR = os.path.join(PROJECT_ROOT, 'output_arena')
+
+def create_mock_data():
+    if not os.path.exists(OUTPUT_ARENA_DIR):
+        os.makedirs(OUTPUT_ARENA_DIR)
+        print(f"Created directory: {OUTPUT_ARENA_DIR}")
+
+    # 创建 3 个模拟比赛数据
+    mock_matches = ['match_001', 'match_002', 'match_003']
+    
+    for match_id in mock_matches:
+        match_dir = os.path.join(OUTPUT_ARENA_DIR, match_id)
+        if not os.path.exists(match_dir):
+            os.makedirs(match_dir)
+        
+        file_path = os.path.join(match_dir, 'iframe_network.json')
+        if not os.path.exists(file_path):
+            mock_content = {
+                "match_id": match_id,
+                "data": "This is mock data for testing."
+            }
+            with open(file_path, 'w', encoding='utf-8') as f:
+                json.dump(mock_content, f)
+            print(f"Created mock file: {file_path}")
+        else:
+            print(f"File already exists: {file_path}")
+
+if __name__ == "__main__":
+    create_mock_data()
\ No newline at end of file
diff --git a/ETL/verify/test_L1_incremental.py b/ETL/verify/test_L1_incremental.py
new file mode 100644
index 0000000..e6ab1a1
--- /dev/null
+++ b/ETL/verify/test_L1_incremental.py
@@ -0,0 +1,76 @@
+import os
+import sqlite3
+import subprocess
+import glob
+
+# 配置路径
+# 当前脚本位于 ETL/verify/ 目录下，需要向上两级找到项目根目录
+CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
+PROJECT_ROOT = os.path.dirname(os.path.dirname(CURRENT_DIR))
+
+L1_SCRIPT = os.path.join(PROJECT_ROOT, 'ETL', 'L1A.py')
+DB_PATH = os.path.join(PROJECT_ROOT, 'database', 'L1A', 'L1A.sqlite')
+OUTPUT_ARENA_DIR = os.path.join(PROJECT_ROOT, 'output_arena')
+
+def get_db_count():
+    """获取数据库中的记录数"""
+    if not os.path.exists(DB_PATH):
+        return 0
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        cursor = conn.cursor()
+        cursor.execute("SELECT COUNT(*) FROM raw_iframe_network")
+        count = cursor.fetchone()[0]
+        conn.close()
+        return count
+    except Exception:
+        return 0
+
+def get_file_count():
+    """获取源文件总数"""
+    pattern = os.path.join(OUTPUT_ARENA_DIR, '*', 'iframe_network.json')
+    files = glob.glob(pattern)
+    return len(files)
+
+def run_l1_script():
+    """运行 L1 脚本并返回输出"""
+    # 必须在项目根目录下运行，或者正确处理 Python 路径
+    # 这里我们使用绝对路径调用脚本
+    result = subprocess.run(['python', L1_SCRIPT], capture_output=True, text=True)
+    return result.stdout
+
+def main():
+    print("=== 开始 L1 增量逻辑测试 ===")
+    print(f"项目根目录: {PROJECT_ROOT}")
+    
+    # 1. 检查环境
+    total_files = get_file_count()
+    initial_db_count = get_db_count()
+    print(f"[环境] 源文件总数: {total_files}")
+    print(f"[环境] 数据库当前记录数: {initial_db_count}")
+    
+    # 2. 运行脚本 (第一次)
+    print("\n--- 运行 L1A.py (Run 1) ---")
+    output1 = run_l1_script()
+    print(output1.strip())
+    
+    mid_db_count = get_db_count()
+    print(f"[状态] 运行后数据库记录数: {mid_db_count}")
+    
+    if mid_db_count < total_files:
+        print("警告: 数据库记录数少于文件数，可能部分文件处理失败或尚未完成。")
+    
+    # 3. 运行脚本 (第二次 - 验证增量)
+    print("\n--- 再次运行 L1A.py (Run 2 - 验证增量) ---")
+    output2 = run_l1_script()
+    print(output2.strip())
+    
+    # 4. 验证结果
+    expected_msg = f"Skipped: {total_files}"
+    if expected_msg in output2:
+        print("\n✅ 测试通过! 第二次运行跳过了所有文件，增量逻辑生效。")
+    else:
+        print(f"\n❌ 测试未通过。预期输出应包含 '{expected_msg}'")
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file