diff --git a/cmd/miner/common/config.go b/cmd/miner/common/config.go
index ac4a9b7d..9d56a28a 100644
--- a/cmd/miner/common/config.go
+++ b/cmd/miner/common/config.go
@@ -74,6 +74,8 @@ type OptionalConfig struct {
 	Freqs         string `long:"freqs" description:"freq settings" default-mask:"1000,200|"`
 	BaseDiff      uint   `long:"base_diff" description:"base_diff settings,default 4G" default-mask:"224"`
 	UartPath      string `long:"uart_path" description:"uarts path split with ," default-mask:"/dev/ttyS1"`
+	WindowSize    int    `long:"windowsize" description:"windows size" default-mask:"10"`
+	BlockPerTime  int    `long:"blockpertime" description:"block per time" default-mask:"1"`
 }
 
 type PoolConfig struct {
@@ -204,6 +206,8 @@ func LoadConfig() (*GlobalConfig, []string, error) {
 		TaskForceStop: true,
 		ForceSolo:     false,
 		NumOfChips:    14,
+		WindowSize:    10,
+		BlockPerTime:  1,
 	}
 
 	// Create the home directory if it doesn't already exist.
diff --git a/cmd/miner/core/device.go b/cmd/miner/core/device.go
index 6a4b920d..bc6f6055 100644
--- a/cmd/miner/core/device.go
+++ b/cmd/miner/core/device.go
@@ -1,4 +1,5 @@
-/**
+/*
+*
 Qitmeer
 james
 */
@@ -7,10 +8,11 @@ package core
 import (
 	"context"
 	"fmt"
-	"github.com/Qitmeer/qng/cmd/miner/common"
 	"math"
 	"sync"
 	"time"
+
+	"github.com/Qitmeer/qng/cmd/miner/common"
 )
 
 type BaseDevice interface {
diff --git a/cmd/miner/symbols/lib/robot.go b/cmd/miner/symbols/lib/robot.go
index 4eaed991..ca47ca80 100644
--- a/cmd/miner/symbols/lib/robot.go
+++ b/cmd/miner/symbols/lib/robot.go
@@ -46,6 +46,8 @@ type QitmeerRobot struct {
 	PendingLock          sync.Mutex
 	SubmitLock           sync.Mutex
 	WsClient             *client.Client
+	SubmitCount          int
+	SubmitStart          time.Time
 }
 
 func (this *QitmeerRobot) GetPow(i int, ctx context.Context, uart_path string, allCount uint64) core.BaseDevice {
@@ -205,6 +207,7 @@ func (this *QitmeerRobot) NotifyWork(r bool) {
 func (this *QitmeerRobot) SubmitWork() {
 	common.MinerLoger.Info("listen submit block server")
 	this.Wg.Add(1)
+	this.SubmitStart = time.Now()
 	go func() {
 		defer this.Wg.Done()
 		str := ""
@@ -220,12 +223,27 @@ func (this *QitmeerRobot) SubmitWork() {
 					this.StaleShares++
 					continue
 				}
+				this.SubmitCount++
 				this.SubmitLock.Lock()
 				var err error
 				var txID string
 				var height int
 				var blockHash string
 				var gbtID string
+				if this.SubmitCount == this.Cfg.OptionConfig.WindowSize {
+					allNeedTime := time.Duration(this.Cfg.OptionConfig.WindowSize * this.Cfg.OptionConfig.BlockPerTime * int(time.Second))
+					spent := time.Since(this.SubmitStart)
+					offset := allNeedTime - spent
+					common.MinerLoger.Info(fmt.Sprintf("Finished mining %d blocks", this.Cfg.OptionConfig.WindowSize), "spent", spent, "slept", offset)
+					if offset > 0 {
+						t1 := time.NewTimer(offset)
+						<-t1.C
+						t1.Stop()
+					}
+					this.SubmitCount = 0
+					this.SubmitStart = time.Now()
+
+				}
 				if this.Pool {
 					arr = strings.Split(str, "-")
 					// block = arr[0]
diff --git a/services/miner/api.go b/services/miner/api.go
index aa056064..227e47ad 100644
--- a/services/miner/api.go
+++ b/services/miner/api.go
@@ -218,9 +218,9 @@ func (api *PublicMinerAPI) SubmitBlockHeader(hexBlockHeader string, extraNonce *
 }
 
 func (api *PublicMinerAPI) checkSubmitLimit() error {
-	if time.Since(api.miner.stats.LastestSubmit) < SubmitInterval {
-		return fmt.Errorf("Submission interval Limited:%s < %s\n", time.Since(api.miner.stats.LastestSubmit), SubmitInterval)
-	}
+	// if time.Since(api.miner.stats.LastestSubmit) < SubmitInterval {
+	// 	return fmt.Errorf("Submission interval Limited:%s < %s\n", time.Since(api.miner.stats.LastestSubmit), SubmitInterval)
+	// }
 	return nil
 }