diff --git a/apis/apps/v1alpha1/ephemeraljob_types.go b/apis/apps/v1alpha1/ephemeraljob_types.go
index ef6d018f87..65d11b9b81 100644
--- a/apis/apps/v1alpha1/ephemeraljob_types.go
+++ b/apis/apps/v1alpha1/ephemeraljob_types.go
@@ -37,7 +37,7 @@ type EphemeralJobSpec struct {
 
 	// Replicas indicates a part of the quantity from matched pods by selector.
 	// Usually it is used for gray scale working.
-	// if Replicas exceeded the matched number by selector, replicas will not work.
+	// if Replicas exceeded the matched number by selector or not be set, replicas will not work.
 	Replicas *int32 `json:"replicas,omitempty"`
 
 	// Parallelism specifies the maximum desired number of pods which matches running ephemeral containers.
diff --git a/config/crd/bases/apps.kruise.io_ephemeraljobs.yaml b/config/crd/bases/apps.kruise.io_ephemeraljobs.yaml
index 3e73107de6..024b64f0c8 100644
--- a/config/crd/bases/apps.kruise.io_ephemeraljobs.yaml
+++ b/config/crd/bases/apps.kruise.io_ephemeraljobs.yaml
@@ -88,8 +88,8 @@ spec:
               replicas:
                 description: Replicas indicates a part of the quantity from matched
                   pods by selector. Usually it is used for gray scale working. if
-                  Replicas exceeded the matched number by selector, replicas will
-                  not work.
+                  Replicas exceeded the matched number by selector or not be set,
+                  replicas will not work.
                 format: int32
                 type: integer
               selector:
diff --git a/pkg/controller/ephemeraljob/ephemeraljob_controller.go b/pkg/controller/ephemeraljob/ephemeraljob_controller.go
index 28fdaefe76..50d9edc3e1 100644
--- a/pkg/controller/ephemeraljob/ephemeraljob_controller.go
+++ b/pkg/controller/ephemeraljob/ephemeraljob_controller.go
@@ -255,7 +255,7 @@ func (r *ReconcileEphemeralJob) filterPods(job *appsv1alpha1.EphemeralJob) ([]*v
 			continue
 		}
 
-		if len(targetPods) < int(*job.Spec.Replicas) {
+		if job.Spec.Replicas == nil || len(targetPods) < int(*job.Spec.Replicas) {
 			targetPods = append(targetPods, &podList.Items[i])
 		}
 	}
@@ -375,20 +375,27 @@ func (r *ReconcileEphemeralJob) calculateStatus(job *appsv1alpha1.EphemeralJob,
 		return err
 	}
 
+	var replicas int32
+	if job.Spec.Replicas == nil {
+		replicas = job.Status.Matches
+	} else {
+		replicas = *job.Spec.Replicas
+	}
+
 	if job.Status.Matches == 0 {
 		job.Status.Phase = appsv1alpha1.EphemeralJobWaiting
 		job.Status.Conditions = addConditions(job.Status.Conditions, appsv1alpha1.EJobMatchedEmpty, "MatchEmpty", "job match no pods")
-	} else if job.Status.Succeeded == *job.Spec.Replicas && job.Status.Succeeded > 0 {
+	} else if job.Status.Succeeded == replicas && job.Status.Succeeded > 0 {
 		job.Status.CompletionTime = timeNow()
 		job.Status.Phase = appsv1alpha1.EphemeralJobSucceeded
 		job.Status.Conditions = addConditions(job.Status.Conditions, appsv1alpha1.EJobSucceeded, "JobSucceeded", "job success to run all tasks")
 	} else if job.Status.Running > 0 {
 		job.Status.Phase = appsv1alpha1.EphemeralJobRunning
-	} else if job.Status.Failed == *job.Spec.Replicas {
+	} else if job.Status.Failed == replicas {
 		job.Status.CompletionTime = timeNow()
 		job.Status.Phase = appsv1alpha1.EphemeralJobFailed
 		job.Status.Conditions = addConditions(job.Status.Conditions, appsv1alpha1.EJobFailed, "JobFailed", "job failed to run all tasks")
-	} else if job.Status.Waiting == *job.Spec.Replicas {
+	} else if job.Status.Waiting == replicas {
 		job.Status.Phase = appsv1alpha1.EphemeralJobWaiting
 	} else {
 		job.Status.Phase = appsv1alpha1.EphemeralJobUnknown