diff --git a/pkg/descheduler/controllers/migration/arbitrator/filter.go b/pkg/descheduler/controllers/migration/arbitrator/filter.go
index 00bfb0cf5..63b256924 100644
--- a/pkg/descheduler/controllers/migration/arbitrator/filter.go
+++ b/pkg/descheduler/controllers/migration/arbitrator/filter.go
@@ -85,7 +85,6 @@ func NewFilter(args *deschedulerconfig.MigrationControllerArgs, handle framework
 		client:           options.Manager.GetClient(),
 		args:             args,
 		controllerFinder: controllerFinder,
-		mu:               sync.Mutex{},
 		clock:            clock.RealClock{},
 	}
 	if err := f.initFilters(args, handle); err != nil {
diff --git a/pkg/descheduler/controllers/migration/controller.go b/pkg/descheduler/controllers/migration/controller.go
index 88e4f3dc5..4955929fb 100644
--- a/pkg/descheduler/controllers/migration/controller.go
+++ b/pkg/descheduler/controllers/migration/controller.go
@@ -20,7 +20,6 @@ import (
 	"context"
 	"fmt"
 	"strconv"
-	"sync"
 	"time"
 
 	corev1 "k8s.io/api/core/v1"
@@ -76,7 +75,6 @@ type Reconciler struct {
 	assumedCache           *assumedCache
 	clock                  clock.Clock
 
-	lock   sync.Mutex
 	filter arbitrator.MigrationFilter
 }
 
@@ -100,14 +98,12 @@ func New(args runtime.Object, handle framework.Handle) (framework.Plugin, error)
 		return nil, err
 	}
 
-	// New filter
 	filter, arbitrationFilter, err := arbitrator.NewFilter(controllerArgs, handle)
 	if err != nil {
 		return nil, err
 	}
 	r.filter = filter
 
-	// New Arbitrator
 	a, err := arbitrator.New(controllerArgs.ArbitrationArgs, arbitrator.Options{
 		Client:        r.Client,
 		EventRecorder: r.eventRecorder,
@@ -928,3 +924,12 @@ func (r *Reconciler) updateCondition(ctx context.Context, job *sev1alpha1.PodMig
 	}
 	return nil
 }
+
+// Filter checks if a pod can be evicted
+func (r *Reconciler) Filter(pod *corev1.Pod) bool {
+	return r.filter.Filter(pod)
+}
+
+func (r *Reconciler) PreEvictionFilter(pod *corev1.Pod) bool {
+	return r.filter.PreEvictionFilter(pod)
+}
diff --git a/pkg/descheduler/controllers/migration/filter.go b/pkg/descheduler/controllers/migration/filter.go
deleted file mode 100644
index 5b26324cf..000000000
--- a/pkg/descheduler/controllers/migration/filter.go
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
-Copyright 2022 The Koordinator Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package migration
-
-import (
-	corev1 "k8s.io/api/core/v1"
-)
-
-// Filter checks if a pod can be evicted
-func (r *Reconciler) Filter(pod *corev1.Pod) bool {
-	return r.filter.Filter(pod)
-}
-
-func (r *Reconciler) PreEvictionFilter(pod *corev1.Pod) bool {
-	return r.filter.PreEvictionFilter(pod)
-}