diff --git a/pkg/apis/scheduling/v1alpha1/types.go b/pkg/apis/scheduling/v1alpha1/types.go
index 8ddf64259..c8ff2c7db 100644
--- a/pkg/apis/scheduling/v1alpha1/types.go
+++ b/pkg/apis/scheduling/v1alpha1/types.go
@@ -114,6 +114,15 @@ type PodGroupSpec struct {
 	// Queue defines the queue to allocate resource for PodGroup; if queue does not exist,
 	// the PodGroup will not be scheduled.
 	Queue string `json:"queue,omitempty" protobuf:"bytes,2,opt,name=queue"`
+
+	// If specified, indicates the PodGroup's priority. "system-node-critical" and
+	// "system-cluster-critical" are two special keywords which indicate the
+	// highest priorities with the former being the highest priority. Any other
+	// name must be defined by creating a PriorityClass object with that name.
+	// If not specified, the PodGroup priority will be default or zero if there is no
+	// default.
+	// +optional
+	PriorityClassName string `json:"priorityClassName,omitempty" protobuf:"bytes,3,opt,name=priorityClassName"`
 }
 
 // PodGroupStatus represents the current state of a pod group.
diff --git a/pkg/scheduler/api/job_info.go b/pkg/scheduler/api/job_info.go
index 4e9afd801..e773e53f9 100644
--- a/pkg/scheduler/api/job_info.go
+++ b/pkg/scheduler/api/job_info.go
@@ -124,7 +124,7 @@ type JobInfo struct {
 
 	Queue QueueID
 
-	Priority int
+	Priority int32
 
 	NodeSelector map[string]string
 	MinAvailable int32
diff --git a/pkg/scheduler/cache/cache.go b/pkg/scheduler/cache/cache.go
index dea066285..e054ba813 100644
--- a/pkg/scheduler/cache/cache.go
+++ b/pkg/scheduler/cache/cache.go
@@ -25,6 +25,7 @@ import (
 	"github.com/golang/glog"
 
 	"k8s.io/api/core/v1"
+	"k8s.io/api/scheduling/v1beta1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
@@ -32,6 +33,7 @@ import (
 	"k8s.io/client-go/informers"
 	infov1 "k8s.io/client-go/informers/core/v1"
 	policyv1 "k8s.io/client-go/informers/policy/v1beta1"
+	schedv1 "k8s.io/client-go/informers/scheduling/v1beta1"
 	storagev1 "k8s.io/client-go/informers/storage/v1"
 	"k8s.io/client-go/kubernetes"
 	corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
@@ -82,6 +84,7 @@ type SchedulerCache struct {
 	pvInformer       infov1.PersistentVolumeInformer
 	pvcInformer      infov1.PersistentVolumeClaimInformer
 	scInformer       storagev1.StorageClassInformer
+	pcInformer       schedv1.PriorityClassInformer
 
 	Binder        Binder
 	Evictor       Evictor
@@ -90,9 +93,12 @@ type SchedulerCache struct {
 
 	Recorder record.EventRecorder
 
-	Jobs   map[kbapi.JobID]*kbapi.JobInfo
-	Nodes  map[string]*kbapi.NodeInfo
-	Queues map[kbapi.QueueID]*kbapi.QueueInfo
+	Jobs                 map[kbapi.JobID]*kbapi.JobInfo
+	Nodes                map[string]*kbapi.NodeInfo
+	Queues               map[kbapi.QueueID]*kbapi.QueueInfo
+	PriorityClasses      map[string]*v1beta1.PriorityClass
+	defaultPriorityClass *v1beta1.PriorityClass
+	defaultPriority      int32
 
 	errTasks    workqueue.RateLimitingInterface
 	deletedJobs workqueue.RateLimitingInterface
@@ -179,14 +185,15 @@ func (dvb *defaultVolumeBinder) BindVolumes(task *api.TaskInfo) error {
 
 func newSchedulerCache(config *rest.Config, schedulerName string, defaultQueue string) *SchedulerCache {
 	sc := &SchedulerCache{
-		Jobs:         make(map[kbapi.JobID]*kbapi.JobInfo),
-		Nodes:        make(map[string]*kbapi.NodeInfo),
-		Queues:       make(map[kbapi.QueueID]*kbapi.QueueInfo),
-		errTasks:     workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter()),
-		deletedJobs:  workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter()),
-		kubeclient:   kubernetes.NewForConfigOrDie(config),
-		kbclient:     kbver.NewForConfigOrDie(config),
-		defaultQueue: defaultQueue,
+		Jobs:            make(map[kbapi.JobID]*kbapi.JobInfo),
+		Nodes:           make(map[string]*kbapi.NodeInfo),
+		Queues:          make(map[kbapi.QueueID]*kbapi.QueueInfo),
+		PriorityClasses: make(map[string]*v1beta1.PriorityClass),
+		errTasks:        workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter()),
+		deletedJobs:     workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter()),
+		kubeclient:      kubernetes.NewForConfigOrDie(config),
+		kbclient:        kbver.NewForConfigOrDie(config),
+		defaultQueue:    defaultQueue,
 	}
 
 	// Prepare event clients.
@@ -263,6 +270,13 @@ func newSchedulerCache(config *rest.Config, schedulerName string, defaultQueue s
 		DeleteFunc: sc.DeletePDB,
 	})
 
+	sc.pcInformer = informerFactory.Scheduling().V1beta1().PriorityClasses()
+	sc.pcInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
+		AddFunc:    sc.AddPriorityClass,
+		UpdateFunc: sc.UpdatePriorityClass,
+		DeleteFunc: sc.DeletePriorityClass,
+	})
+
 	kbinformer := kbinfo.NewSharedInformerFactory(sc.kbclient, 0)
 	// create informer for PodGroup information
 	sc.podGroupInformer = kbinformer.Scheduling().V1alpha1().PodGroups()
@@ -292,6 +306,7 @@ func (sc *SchedulerCache) Run(stopCh <-chan struct{}) {
 	go sc.pvcInformer.Informer().Run(stopCh)
 	go sc.scInformer.Informer().Run(stopCh)
 	go sc.queueInformer.Informer().Run(stopCh)
+	go sc.pcInformer.Informer().Run(stopCh)
 
 	// Re-sync error tasks.
 	go wait.Until(sc.processResyncTask, 0, stopCh)
@@ -311,6 +326,7 @@ func (sc *SchedulerCache) WaitForCacheSync(stopCh <-chan struct{}) bool {
 		sc.pvcInformer.Informer().HasSynced,
 		sc.scInformer.Informer().HasSynced,
 		sc.queueInformer.Informer().HasSynced,
+		sc.pcInformer.Informer().HasSynced,
 	)
 }
 
@@ -527,6 +543,15 @@ func (sc *SchedulerCache) Snapshot() *kbapi.ClusterInfo {
 			continue
 		}
 
+		if value.PodGroup != nil {
+			value.Priority = sc.defaultPriority
+
+			priName := value.PodGroup.Spec.PriorityClassName
+			if priorityClass, found := sc.PriorityClasses[priName]; found {
+				value.Priority = priorityClass.Value
+			}
+		}
+
 		snapshot.Jobs[value.UID] = value.Clone()
 	}
 
diff --git a/pkg/scheduler/cache/event_handlers.go b/pkg/scheduler/cache/event_handlers.go
index 39c77a72c..9f2db863d 100644
--- a/pkg/scheduler/cache/event_handlers.go
+++ b/pkg/scheduler/cache/event_handlers.go
@@ -18,6 +18,7 @@ package cache
 
 import (
 	"fmt"
+	"k8s.io/api/scheduling/v1beta1"
 	"reflect"
 
 	"github.com/golang/glog"
@@ -671,3 +672,97 @@ func (sc *SchedulerCache) deleteQueue(queue *kbv1.Queue) error {
 
 	return nil
 }
+
+func (sc *SchedulerCache) DeletePriorityClass(obj interface{}) {
+	var ss *v1beta1.PriorityClass
+	switch t := obj.(type) {
+	case *v1beta1.PriorityClass:
+		ss = t
+	case cache.DeletedFinalStateUnknown:
+		var ok bool
+		ss, ok = t.Obj.(*v1beta1.PriorityClass)
+		if !ok {
+			glog.Errorf("Cannot convert to *v1beta1.PriorityClass: %v", t.Obj)
+			return
+		}
+	default:
+		glog.Errorf("Cannot convert to *v1beta1.PriorityClass: %v", t)
+		return
+	}
+
+	sc.Mutex.Lock()
+	defer sc.Mutex.Unlock()
+
+	sc.deletePriorityClass(ss)
+}
+
+func (sc *SchedulerCache) UpdatePriorityClass(oldObj, newObj interface{}) {
+	oldSS, ok := oldObj.(*v1beta1.PriorityClass)
+	if !ok {
+		glog.Errorf("Cannot convert oldObj to *v1beta1.PriorityClass: %v", oldObj)
+
+		return
+
+	}
+
+	newSS, ok := newObj.(*v1beta1.PriorityClass)
+	if !ok {
+		glog.Errorf("Cannot convert newObj to *v1beta1.PriorityClass: %v", newObj)
+
+		return
+
+	}
+
+	sc.Mutex.Lock()
+	defer sc.Mutex.Unlock()
+
+	sc.deletePriorityClass(oldSS)
+	sc.addPriorityClass(newSS)
+}
+
+func (sc *SchedulerCache) AddPriorityClass(obj interface{}) {
+	var ss *v1beta1.PriorityClass
+	switch t := obj.(type) {
+	case *v1beta1.PriorityClass:
+		ss = t
+	case cache.DeletedFinalStateUnknown:
+		var ok bool
+		ss, ok = t.Obj.(*v1beta1.PriorityClass)
+		if !ok {
+			glog.Errorf("Cannot convert to *v1beta1.PriorityClass: %v", t.Obj)
+			return
+		}
+	default:
+		glog.Errorf("Cannot convert to *v1beta1.PriorityClass: %v", t)
+		return
+	}
+
+	sc.Mutex.Lock()
+	defer sc.Mutex.Unlock()
+
+	sc.addPriorityClass(ss)
+}
+
+func (sc *SchedulerCache) deletePriorityClass(pc *v1beta1.PriorityClass) {
+	if pc.GlobalDefault {
+		sc.defaultPriorityClass = nil
+		sc.defaultPriority = 0
+
+	}
+
+	delete(sc.PriorityClasses, pc.Name)
+}
+
+func (sc *SchedulerCache) addPriorityClass(pc *v1beta1.PriorityClass) {
+	if pc.GlobalDefault {
+		if sc.defaultPriorityClass != nil {
+			glog.Errorf("Updated default priority class from <%s> to <%s> forcefully.",
+				sc.defaultPriorityClass.Name, pc.Name)
+
+		}
+		sc.defaultPriorityClass = pc
+		sc.defaultPriority = pc.Value
+	}
+
+	sc.PriorityClasses[pc.Name] = pc
+}