diff --git a/bitmart/抓取数据_30分钟.py b/bitmart/抓取数据_30分钟.py
index d0e7e01..7e98086 100644
--- a/bitmart/抓取数据_30分钟.py
+++ b/bitmart/抓取数据_30分钟.py
@@ -6,7 +6,7 @@ BitMart 30分钟K线数据抓取脚本
 import time
 from loguru import logger
 from bitmart.api_contract import APIContract
-from models.bitmart import BitMart30
+from models.bitmart_15 import BitMart15
 
 
 class BitMartDataCollector:
@@ -29,11 +29,11 @@ class BitMartDataCollector:
             if not end_time:
                 end_time = int(time.time())
             if not start_time:
-                start_time = end_time - 3600 * 24 * 7  # 默认获取最近7天
+                start_time = end_time - 3600 * 24 * 1  # 默认获取最近7天
 
             response = self.contractAPI.get_kline(
                 contract_symbol=self.contract_symbol,
-                step=30,  # 30分钟
+                step=15,  # 30分钟
                 start_time=start_time,
                 end_time=end_time
             )[0]
@@ -73,7 +73,7 @@ class BitMartDataCollector:
         saved_count = 0
         for kline in klines:
             try:
-                BitMart30.get_or_create(
+                BitMart15.get_or_create(
                     id=kline['id'],
                     defaults={
                         'open': kline['open'],
@@ -144,7 +144,7 @@ if __name__ == '__main__':
     collector = BitMartDataCollector()
     
     # 抓取最近30天的历史数据
-    collector.collect_historical_data(days=365)
+    collector.collect_historical_data(days=500)
     
     # 如果需要实时抓取，可以取消下面的注释
     # collector.collect_realtime_data()
diff --git a/models/bitmart_15.py b/models/bitmart_15.py
new file mode 100644
index 0000000..5360111
--- /dev/null
+++ b/models/bitmart_15.py
@@ -0,0 +1,21 @@
+from peewee import *
+
+from models import db
+
+
+class BitMart15(Model):
+    id = IntegerField(primary_key=True)  # 时间戳（毫秒级）
+    open = FloatField(null=True)
+    high = FloatField(null=True)
+    low = FloatField(null=True)
+    close = FloatField(null=True)
+
+    class Meta:
+        database = db
+        table_name = 'bitmart_15'
+
+
+# 连接到数据库
+db.connect()
+# 创建表（如果表不存在）
+db.create_tables([BitMart15])
diff --git a/models/database.db b/models/database.db
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