diff --git a/internal/controller/visitor.go b/internal/controller/visitor.go
index b34f93f..39d24da 100644
--- a/internal/controller/visitor.go
+++ b/internal/controller/visitor.go
@@ -3,6 +3,8 @@ package controller
 import (
 	"context"
 	"github.com/gogf/gf/v2/errors/gerror"
+	"github.com/gogf/gf/v2/os/gtime"
+	"github.com/gogf/gf/v2/util/gconv"
 	"vistor/api/v1"
 	"vistor/internal/service"
 )
@@ -22,6 +24,12 @@ func (c *cVisitor) VisitorAccess(ctx context.Context, req *v1.VisitorAccessReq)
 }
 
 func (c *cVisitor) VisitorStatistic(ctx context.Context, req *v1.VisitorStatisticReq) (res *v1.VisitorStatisticRes, err error) {
+	diff := service.Visitor.GetDiffDays(gtime.New(req.EndDate).Time, gtime.New(req.StartDate).Time)
+	duration := gconv.Int(diff) + 1
+	if duration > 30 {
+		return nil, gerror.Newf("请选择30天内日期进行查询")
+	}
+
 	res, err = service.Visitor.VisitorStatistic(ctx, req)
 	if err != nil {
 		return nil, gerror.Newf("系统繁忙，请稍后再试")
diff --git a/internal/service/visitor.go b/internal/service/visitor.go
index 60945aa..3c0e3ad 100644
--- a/internal/service/visitor.go
+++ b/internal/service/visitor.go
@@ -25,6 +25,7 @@ var Visitor = visitorService{}
 type IVisitor interface {
 	VisitorAccess(ctx context.Context, req *v1.VisitorAccessReq) error
 	VisitorStatistic(ctx context.Context, req *v1.VisitorAccessReq) (res *v1.VisitorAccessRes, err error)
+	GetDiffDays(t1, t2 time.Time) int
 }
 
 func (s *visitorService) VisitorAccess(ctx context.Context, req *v1.VisitorAccessReq) error {
@@ -64,10 +65,12 @@ func (s *visitorService) VisitorStatistic(ctx context.Context, req *v1.VisitorSt
 	}
 
 	if req.StatisticType == consts.StatisticTypeDay {
-		startDate := gconv.Int(gtime.New(req.EndDate).Format("Ymd"))
-		endDate := gconv.Int(gtime.New(req.StartDate).Format("Ymd"))
+		diff := s.GetDiffDays(gtime.New(req.EndDate).Time, gtime.New(req.StartDate).Time)
+		duration := gconv.Int(diff) + 1
 
-		duration := startDate - endDate + 1
+		if duration > 30 {
+			return nil, gerror.Newf("请选择30天内日期进行查询")
+		}
 
 		for i := 0; duration > i; i++ {
 			xAxis = append(xAxis, gtime.New(req.StartDate).AddDate(0, 0, i).Format("Y-m-d"))
@@ -147,6 +150,14 @@ func (s *visitorService) VisitorStatistic(ctx context.Context, req *v1.VisitorSt
 	return
 }
 
+// GetDiffDays 获取两个时间相差的天数，0表同一天，正数表t1>t2，负数表t1<t2
+func (s *visitorService) GetDiffDays(t1, t2 time.Time) int {
+	t1 = time.Date(t1.Year(), t1.Month(), t1.Day(), 0, 0, 0, 0, time.Local)
+	t2 = time.Date(t2.Year(), t2.Month(), t2.Day(), 0, 0, 0, 0, time.Local)
+
+	return int(t1.Sub(t2).Hours() / 24)
+}
+
 func (s *visitorService) getYearStatistic(ctx context.Context, lastYearNum int, condition g.Map) (xAxis g.SliceStr, yAxis g.SliceStr) {
 	for ; 1 <= lastYearNum; lastYearNum-- {
 		//获取当年第一天