diff --git a/core/breaker/breaker.go b/core/breaker/breaker.go
index c542c339..24fa684e 100644
--- a/core/breaker/breaker.go
+++ b/core/breaker/breaker.go
@@ -13,11 +13,6 @@ import (
 	"github.com/tal-tech/go-zero/core/timex"
 )
 
-const (
-	StateClosed State = iota
-	StateOpen
-)
-
 const (
 	numHistoryReasons = 5
 	timeFormat        = "15:04:05"
@@ -27,7 +22,6 @@ const (
 var ErrServiceUnavailable = errors.New("circuit breaker is open")
 
 type (
-	State      = int32
 	Acceptable func(err error) bool
 
 	Breaker interface {
diff --git a/core/breaker/googlebreaker.go b/core/breaker/googlebreaker.go
index aaae5df7..6e09b5e4 100644
--- a/core/breaker/googlebreaker.go
+++ b/core/breaker/googlebreaker.go
@@ -2,7 +2,6 @@ package breaker
 
 import (
 	"math"
-	"sync/atomic"
 	"time"
 
 	"github.com/tal-tech/go-zero/core/collection"
@@ -21,7 +20,6 @@ const (
 // see Client-Side Throttling section in https://landing.google.com/sre/sre-book/chapters/handling-overload/
 type googleBreaker struct {
 	k     float64
-	state int32
 	stat  *collection.RollingWindow
 	proba *mathx.Proba
 }
@@ -32,7 +30,6 @@ func newGoogleBreaker() *googleBreaker {
 	return &googleBreaker{
 		stat:  st,
 		k:     k,
-		state: StateClosed,
 		proba: mathx.NewProba(),
 	}
 }
@@ -43,15 +40,9 @@ func (b *googleBreaker) accept() error {
 	// https://landing.google.com/sre/sre-book/chapters/handling-overload/#eq2101
 	dropRatio := math.Max(0, (float64(total-protection)-weightedAccepts)/float64(total+1))
 	if dropRatio <= 0 {
-		if atomic.LoadInt32(&b.state) == StateOpen {
-			atomic.CompareAndSwapInt32(&b.state, StateOpen, StateClosed)
-		}
 		return nil
 	}
 
-	if atomic.LoadInt32(&b.state) == StateClosed {
-		atomic.CompareAndSwapInt32(&b.state, StateClosed, StateOpen)
-	}
 	if b.proba.TrueOnProba(dropRatio) {
 		return ErrServiceUnavailable
 	}
diff --git a/core/breaker/googlebreaker_test.go b/core/breaker/googlebreaker_test.go
index 9caaa67d..242fed87 100644
--- a/core/breaker/googlebreaker_test.go
+++ b/core/breaker/googlebreaker_test.go
@@ -27,7 +27,6 @@ func getGoogleBreaker() *googleBreaker {
 	return &googleBreaker{
 		stat:  st,
 		k:     5,
-		state: StateClosed,
 		proba: mathx.NewProba(),
 	}
 }