diff --git a/hrp/pkg/uixt/android_device.go b/hrp/pkg/uixt/android_device.go
index 42b4757e..c250b21d 100644
--- a/hrp/pkg/uixt/android_device.go
+++ b/hrp/pkg/uixt/android_device.go
@@ -154,6 +154,10 @@ type AndroidDevice struct {
 	LogOn        bool   `json:"log_on,omitempty" yaml:"log_on,omitempty"`
 }
 
+func (dev *AndroidDevice) System() string {
+	return "android"
+}
+
 func (dev *AndroidDevice) UUID() string {
 	return dev.SerialNumber
 }
diff --git a/hrp/pkg/uixt/interface.go b/hrp/pkg/uixt/interface.go
index 71d8e177..ae0d04cc 100644
--- a/hrp/pkg/uixt/interface.go
+++ b/hrp/pkg/uixt/interface.go
@@ -466,7 +466,8 @@ func WithDriverPlugin(plugin funplugin.IPlugin) DriverOption {
 
 // current implemeted device: IOSDevice, AndroidDevice
 type Device interface {
-	UUID() string // ios udid or android serial
+	System() string // ios or android
+	UUID() string   // ios udid or android serial
 	LogEnabled() bool
 	NewDriver(...DriverOption) (driverExt *DriverExt, err error)
 
diff --git a/hrp/pkg/uixt/ios_device.go b/hrp/pkg/uixt/ios_device.go
index 843a34b3..2705ade6 100644
--- a/hrp/pkg/uixt/ios_device.go
+++ b/hrp/pkg/uixt/ios_device.go
@@ -289,6 +289,10 @@ type IOSDevice struct {
 	pcapFile string        // saved pcap file path
 }
 
+func (dev *IOSDevice) System() string {
+	return "ios"
+}
+
 func (dev *IOSDevice) UUID() string {
 	return dev.UDID
 }
diff --git a/hrp/pkg/uixt/video_crawler.go b/hrp/pkg/uixt/video_crawler.go
index def85da9..7ee02c94 100644
--- a/hrp/pkg/uixt/video_crawler.go
+++ b/hrp/pkg/uixt/video_crawler.go
@@ -197,6 +197,9 @@ func (dExt *DriverExt) VideoCrawler(configs *VideoCrawlerConfigs) (err error) {
 				continue
 			}
 
+			// 直播预览流线上概率
+			livePreviewProb := crawler.getLivePreviewProb()
+
 			switch currentVideo.Type {
 			case VideoType_PreviewLive:
 				// 直播预览流
@@ -205,9 +208,8 @@ func (dExt *DriverExt) VideoCrawler(configs *VideoCrawlerConfigs) (err error) {
 					log.Info().Interface("video", currentVideo).
 						Msg("live count achieved, skip entering live room")
 					skipEnterLive = true
-				} else if rand.Float64() <= 0.10 {
-					// 10% chance skip entering live room
-					log.Info().Msg("skip entering preview live by 10% chance")
+				} else if rand.Float64() <= livePreviewProb {
+					log.Info().Interface("livePreviewProb", livePreviewProb).Msg("skip entering preview")
 					skipEnterLive = true
 				}
 
@@ -272,9 +274,8 @@ func (dExt *DriverExt) VideoCrawler(configs *VideoCrawlerConfigs) (err error) {
 					log.Info().Interface("live", currentVideo).
 						Msg("live count achieved, exit live room")
 					exitLive = true
-				} else if rand.Float64() <= 0.10 {
-					// 10% chance exit live room
-					log.Info().Msg("exit live room by 10% chance")
+				} else if rand.Float64() <= livePreviewProb {
+					log.Info().Interface("livePreviewProb", livePreviewProb).Msg("exit live room by preview live chance")
 					exitLive = true
 				}
 				if exitLive && currentVideo.Type == VideoType_Live {
@@ -427,3 +428,12 @@ func (vc *VideoCrawler) getCurrentVideo() (video *Video, err error) {
 		Msg("get current video success")
 	return video, nil
 }
+
+func (vc *VideoCrawler) getLivePreviewProb() float64 {
+	if vc.driverExt.Device.System() == "ios" {
+		return 0.5326
+	} else if vc.driverExt.Device.System() == "android" {
+		return 0.3414
+	}
+	return -1
+}