diff --git a/tushare/cal.go b/tushare/cal.go
new file mode 100644
index 0000000..2260689
--- /dev/null
+++ b/tushare/cal.go
@@ -0,0 +1,78 @@
+package tushare
+
+import (
+	"time"
+
+	"git.apinb.com/quant/qsdk/conv"
+)
+
+/*
+TradeCal 获取交易日历
+
+	exchange: 交易所代码，SSE 上交所，SZSE 深交所，BSE 北交所，空字符串代表所有
+	start_date: 开始日期，格式:YYYYMMDD
+	end_date: 结束日期，格式:YYYYMMDD
+	is_open: 是否开盘，'0'休市，'1'交易，空字符串代表所有
+*/
+func (cli *TushareClient) TradeCal(exchange, start_date, end_date, is_open string) (*TushareRespData, error) {
+	params := map[string]any{}
+
+	if exchange != "" {
+		params["exchange"] = exchange
+	}
+	if start_date != "" {
+		params["start_date"] = start_date
+	}
+	if end_date != "" {
+		params["end_date"] = end_date
+	}
+	if is_open != "" {
+		params["is_open"] = is_open
+	}
+
+	req := TushareReq{
+		APIName: "trade_cal",
+		Params:  params,
+	}
+
+	fields := []map[string]string{
+		{"exchange": "交易所代码"},
+		{"cal_date": "日历日期"},
+		{"is_open": "是否开盘"},
+		{"pretrade_date": "上一交易日"},
+	}
+
+	return cli.Do(req, fields)
+}
+
+func (cli *TushareClient) LastTradeDay() string {
+	result, err := cli.TradeCal("SSE", time.Now().AddDate(0, 0, -15).Format("20060102"), time.Now().Format("20060102"), "1")
+	if err != nil {
+		return ""
+	}
+	cal := result.Map()
+	if len(cal) == 0 {
+		return ""
+	}
+	return conv.AnyToString(cal[0]["cal_date"])
+}
+
+func (cli *TushareClient) LimitTradeDay(limit int) []string {
+	if limit <= 0 {
+		return []string{}
+	}
+	if limit > 100 {
+		limit = 100
+	}
+	result, err := cli.TradeCal("SSE", time.Now().AddDate(0, 0, -100).Format("20060102"), time.Now().Format("20060102"), "1")
+	if err != nil {
+		return []string{}
+	}
+	cal := result.Map()
+	days := []string{}
+	for i := 0; i < limit; i++ {
+		item := cal[i]
+		days = append(days, conv.AnyToString(item["cal_date"]))
+	}
+	return days
+}
diff --git a/tushare/stock.go b/tushare/stock.go
index 00aafc0..f4f1a86 100644
--- a/tushare/stock.go
+++ b/tushare/stock.go
@@ -1,61 +1,5 @@
 package tushare
 
-import (
-	"time"
-
-	"git.apinb.com/quant/qsdk/conv"
-)
-
-/*
-TradeCal 获取交易日历
-
-	exchange: 交易所代码，SSE 上交所，SZSE 深交所，BSE 北交所，空字符串代表所有
-	start_date: 开始日期，格式:YYYYMMDD
-	end_date: 结束日期，格式:YYYYMMDD
-	is_open: 是否开盘，'0'休市，'1'交易，空字符串代表所有
-*/
-func (cli *TushareClient) TradeCal(exchange, start_date, end_date, is_open string) (*TushareRespData, error) {
-	params := map[string]any{}
-
-	if exchange != "" {
-		params["exchange"] = exchange
-	}
-	if start_date != "" {
-		params["start_date"] = start_date
-	}
-	if end_date != "" {
-		params["end_date"] = end_date
-	}
-	if is_open != "" {
-		params["is_open"] = is_open
-	}
-
-	req := TushareReq{
-		APIName: "trade_cal",
-		Params:  params,
-	}
-
-	fields := []map[string]string{
-		{"exchange": "交易所代码"},
-		{"cal_date": "日历日期"},
-		{"is_open": "是否开盘"},
-		{"pretrade_date": "上一交易日"},
-	}
-
-	return cli.Do(req, fields)
-}
-
-func (cli *TushareClient) ReturnLastTradeDay() string {
-	result, err := cli.TradeCal("SSE", time.Now().AddDate(0, 0, -15).Format("20060102"), time.Now().Format("20060102"), "1")
-	if err != nil {
-		return ""
-	}
-	cal := result.Map()
-	if len(cal) == 0 {
-		return ""
-	}
-	return conv.AnyToString(cal[0]["cal_date"])
-}
 
 /*
 StockBasic 获取股票列表