diff --git a/core/base/stat.go b/core/base/stat.go
index 952e53d9e..5a2e505eb 100644
--- a/core/base/stat.go
+++ b/core/base/stat.go
@@ -98,8 +98,8 @@ func (ws *nopWriteStat) AddCount(_ MetricEvent, _ int64) {
 // ConcurrencyStat provides read/update operation for concurrency statistics.
 type ConcurrencyStat interface {
 	CurrentConcurrency() int32
-	IncreaseConcurrency()
-	DecreaseConcurrency()
+	IncreaseConcurrency(int32)
+	DecreaseConcurrency(int32)
 }
 
 // StatNode holds real-time statistics for resources.
diff --git a/core/base/stat_test.go b/core/base/stat_test.go
index d4882a243..c1296ee60 100644
--- a/core/base/stat_test.go
+++ b/core/base/stat_test.go
@@ -69,12 +69,12 @@ func (m *StatNodeMock) CurrentConcurrency() int32 {
 	return int32(args.Int(0))
 }
 
-func (m *StatNodeMock) IncreaseConcurrency() {
+func (m *StatNodeMock) IncreaseConcurrency(count int32) {
 	m.Called()
 	return
 }
 
-func (m *StatNodeMock) DecreaseConcurrency() {
+func (m *StatNodeMock) DecreaseConcurrency(count int32) {
 	m.Called()
 	return
 }
diff --git a/core/stat/base_node.go b/core/stat/base_node.go
index 9ef59b779..23172d856 100644
--- a/core/stat/base_node.go
+++ b/core/stat/base_node.go
@@ -92,12 +92,12 @@ func (n *BaseStatNode) CurrentConcurrency() int32 {
 	return atomic.LoadInt32(&(n.concurrency))
 }
 
-func (n *BaseStatNode) IncreaseConcurrency() {
-	n.UpdateConcurrency(atomic.AddInt32(&(n.concurrency), 1))
+func (n *BaseStatNode) IncreaseConcurrency(count int32) {
+	n.UpdateConcurrency(atomic.AddInt32(&(n.concurrency), count))
 }
 
-func (n *BaseStatNode) DecreaseConcurrency() {
-	atomic.AddInt32(&(n.concurrency), -1)
+func (n *BaseStatNode) DecreaseConcurrency(count int32) {
+	atomic.AddInt32(&(n.concurrency), -count)
 }
 
 func (n *BaseStatNode) GenerateReadStat(sampleCount uint32, intervalInMs uint32) (base.ReadStat, error) {
diff --git a/core/stat/stat_slot.go b/core/stat/stat_slot.go
index 2845dead3..c0f499e09 100644
--- a/core/stat/stat_slot.go
+++ b/core/stat/stat_slot.go
@@ -77,7 +77,7 @@ func (s *Slot) recordPassFor(sn base.StatNode, count uint32) {
 	if sn == nil {
 		return
 	}
-	sn.IncreaseConcurrency()
+	sn.IncreaseConcurrency(int32(count))
 	sn.AddCount(base.MetricEventPass, int64(count))
 }
 
@@ -97,5 +97,5 @@ func (s *Slot) recordCompleteFor(sn base.StatNode, count uint32, rt uint64, err
 	}
 	sn.AddCount(base.MetricEventRt, int64(rt))
 	sn.AddCount(base.MetricEventComplete, int64(count))
-	sn.DecreaseConcurrency()
+	sn.DecreaseConcurrency(int32(count))
 }
diff --git a/core/system/slot_test.go b/core/system/slot_test.go
index aa918aa20..44e947e1d 100644
--- a/core/system/slot_test.go
+++ b/core/system/slot_test.go
@@ -66,11 +66,11 @@ func TestDoCheckRuleConcurrency(t *testing.T) {
 	})
 
 	t.Run("FalseConcurrency", func(t *testing.T) {
-		stat.InboundNode().IncreaseConcurrency()
+		stat.InboundNode().IncreaseConcurrency(1)
 		isOK, _, v := sas.doCheckRule(rule)
 		assert.True(t, util.Float64Equals(float64(1.0), v))
 		assert.Equal(t, false, isOK)
-		stat.InboundNode().DecreaseConcurrency()
+		stat.InboundNode().DecreaseConcurrency(1)
 	})
 }
 
diff --git a/tests/api/api_entry_integration_test.go b/tests/api/api_entry_integration_test.go
index 6ede27826..a56a073b1 100644
--- a/tests/api/api_entry_integration_test.go
+++ b/tests/api/api_entry_integration_test.go
@@ -1,7 +1,9 @@
 package api
 
 import (
+	"github.com/alibaba/sentinel-golang/core/isolation"
 	"log"
+	"os"
 	"runtime/debug"
 	"testing"
 	"time"
@@ -127,3 +129,51 @@ func TestAdaptiveFlowControl2(t *testing.T) {
 	_, blockError := api.Entry(rs, api.WithTrafficType(base.Inbound))
 	assert.Nil(t, blockError)
 }
+
+func assertIsPass(t *testing.T, b *base.BlockError) {
+	assert.True(t, b == nil)
+}
+func assertIsBlock(t *testing.T, b *base.BlockError) {
+	assert.True(t, b != nil)
+}
+
+func Test_Isolation(t *testing.T) {
+	initSentinel()
+
+	r1 := &isolation.Rule{
+		Resource:   "abc",
+		MetricType: isolation.Concurrency,
+		Threshold:  12,
+	}
+	_, err := isolation.LoadRules([]*isolation.Rule{r1})
+	if err != nil {
+		logging.Error(err, "fail")
+		os.Exit(1)
+	}
+
+	entries := make([]*base.SentinelEntry, 0)
+
+	// Threshold = 12, BatchCount = 1, Should Pass 12 Entry
+	for i := 0; i < 12; i++ {
+		e, b := api.Entry("abc", api.WithBatchCount(1))
+		assertIsPass(t, b)
+		entries = append(entries, e)
+	}
+	_, b := api.Entry("abc", api.WithBatchCount(1))
+	assertIsBlock(t, b)
+	for _, e := range entries {
+		e.Exit()
+	}
+
+	// Threshold = 12, BatchCount = 2, Should Pass 6 Entry
+	for i := 0; i < 6; i++ {
+		e, b := api.Entry("abc", api.WithBatchCount(2))
+		assertIsPass(t, b)
+		entries = append(entries, e)
+	}
+	_, b = api.Entry("abc", api.WithBatchCount(2))
+	assertIsBlock(t, b)
+	for _, e := range entries {
+		e.Exit()
+	}
+}