diff --git a/pkg/cloudprovider/resources.go b/pkg/cloudprovider/resources.go
index 8002c18169..440c29ca51 100644
--- a/pkg/cloudprovider/resources.go
+++ b/pkg/cloudprovider/resources.go
@@ -386,7 +386,7 @@ type ICloudDisk interface {
 type ICloudSnapshot interface {
 	IVirtualResource
 
-	GetSize() int32
+	GetSizeMb() int32
 	GetDiskId() string
 	GetDiskType() string
 	Delete() error
diff --git a/pkg/compute/models/snapshots.go b/pkg/compute/models/snapshots.go
index 36b79ee39f..8e7e0c2959 100644
--- a/pkg/compute/models/snapshots.go
+++ b/pkg/compute/models/snapshots.go
@@ -658,6 +658,7 @@ func (self *SSnapshot) SyncWithCloudSnapshot(ctx context.Context, userCred mccli
 		// self.Name = ext.GetName()
 		self.Status = ext.GetStatus()
 		self.DiskType = ext.GetDiskType()
+		self.Size = int(ext.GetSizeMb())
 
 		self.CloudregionId = region.Id
 		return nil
@@ -694,7 +695,7 @@ func (manager *SSnapshotManager) newFromCloudSnapshot(ctx context.Context, userC
 	}
 
 	snapshot.DiskType = extSnapshot.GetDiskType()
-	snapshot.Size = int(extSnapshot.GetSize()) * 1024
+	snapshot.Size = int(extSnapshot.GetSizeMb())
 	snapshot.ManagerId = provider.Id
 	snapshot.CloudregionId = region.Id
 
diff --git a/pkg/multicloud/aliyun/snapshot.go b/pkg/multicloud/aliyun/snapshot.go
index 3e2327127e..65a9383d80 100644
--- a/pkg/multicloud/aliyun/snapshot.go
+++ b/pkg/multicloud/aliyun/snapshot.go
@@ -68,8 +68,8 @@ func (self *SSnapshot) GetStatus() string {
 	}
 }
 
-func (self *SSnapshot) GetSize() int32 {
-	return self.SourceDiskSize
+func (self *SSnapshot) GetSizeMb() int32 {
+	return self.SourceDiskSize * 1024
 }
 
 func (self *SSnapshot) GetDiskId() string {
diff --git a/pkg/multicloud/aws/snapshot.go b/pkg/multicloud/aws/snapshot.go
index 0313ee4f2f..c264b5163a 100644
--- a/pkg/multicloud/aws/snapshot.go
+++ b/pkg/multicloud/aws/snapshot.go
@@ -99,8 +99,8 @@ func (self *SSnapshot) GetMetadata() *jsonutils.JSONDict {
 	return nil
 }
 
-func (self *SSnapshot) GetSize() int32 {
-	return self.SourceDiskSize
+func (self *SSnapshot) GetSizeMb() int32 {
+	return self.SourceDiskSize * 1024
 }
 
 func (self *SSnapshot) GetDiskId() string {
diff --git a/pkg/multicloud/azure/classic_snapshot.go b/pkg/multicloud/azure/classic_snapshot.go
index 7dfbc8a3ae..24c7651f23 100644
--- a/pkg/multicloud/azure/classic_snapshot.go
+++ b/pkg/multicloud/azure/classic_snapshot.go
@@ -64,7 +64,7 @@ func (self *SClassicSnapshot) Delete() error {
 	return self.region.DeleteClassicSnapshot(self.GetId())
 }
 
-func (self *SClassicSnapshot) GetSize() int32 {
+func (self *SClassicSnapshot) GetSizeMb() int32 {
 	return self.sizeMB
 }
 
diff --git a/pkg/multicloud/azure/snapshot.go b/pkg/multicloud/azure/snapshot.go
index 52b3fb238e..c878ccace1 100644
--- a/pkg/multicloud/azure/snapshot.go
+++ b/pkg/multicloud/azure/snapshot.go
@@ -97,8 +97,8 @@ func (self *SSnapshot) Delete() error {
 	return self.region.DeleteSnapshot(self.ID)
 }
 
-func (self *SSnapshot) GetSize() int32 {
-	return self.Properties.DiskSizeGB
+func (self *SSnapshot) GetSizeMb() int32 {
+	return self.Properties.DiskSizeGB * 1024
 }
 
 func (self *SRegion) DeleteSnapshot(snapshotId string) error {
diff --git a/pkg/multicloud/huawei/snapshot.go b/pkg/multicloud/huawei/snapshot.go
index 223b239163..bdc1290149 100644
--- a/pkg/multicloud/huawei/snapshot.go
+++ b/pkg/multicloud/huawei/snapshot.go
@@ -112,8 +112,8 @@ func (self *SSnapshot) GetMetadata() *jsonutils.JSONDict {
 	return nil
 }
 
-func (self *SSnapshot) GetSize() int32 {
-	return self.Size
+func (self *SSnapshot) GetSizeMb() int32 {
+	return self.Size * 1024
 }
 
 func (self *SSnapshot) GetDiskId() string {
diff --git a/pkg/multicloud/openstack/snapshot.go b/pkg/multicloud/openstack/snapshot.go
index 33f200045f..7775afef1d 100644
--- a/pkg/multicloud/openstack/snapshot.go
+++ b/pkg/multicloud/openstack/snapshot.go
@@ -119,8 +119,8 @@ func (snapshot *SSnapshot) GetMetadata() *jsonutils.JSONDict {
 	return nil
 }
 
-func (snapshot *SSnapshot) GetSize() int32 {
-	return snapshot.Size
+func (snapshot *SSnapshot) GetSizeMb() int32 {
+	return snapshot.Size * 1024
 }
 
 func (snapshot *SSnapshot) GetDiskId() string {
diff --git a/pkg/multicloud/qcloud/snapshot.go b/pkg/multicloud/qcloud/snapshot.go
index 6bb39e3e7a..113bd0868c 100644
--- a/pkg/multicloud/qcloud/snapshot.go
+++ b/pkg/multicloud/qcloud/snapshot.go
@@ -173,8 +173,8 @@ func (self *SSnapshot) GetRegionId() string {
 	return self.region.GetId()
 }
 
-func (self *SSnapshot) GetSize() int32 {
-	return self.DiskSize
+func (self *SSnapshot) GetSizeMb() int32 {
+	return self.DiskSize * 1024
 }
 
 func (self *SSnapshot) GetDiskId() string {
diff --git a/pkg/multicloud/ucloud/snapshot.go b/pkg/multicloud/ucloud/snapshot.go
index fa78b538e6..66cfc9dc0b 100644
--- a/pkg/multicloud/ucloud/snapshot.go
+++ b/pkg/multicloud/ucloud/snapshot.go
@@ -102,8 +102,8 @@ func (self *SSnapshot) GetMetadata() *jsonutils.JSONDict {
 	return nil
 }
 
-func (self *SSnapshot) GetSize() int32 {
-	return self.SizeGB
+func (self *SSnapshot) GetSizeMb() int32 {
+	return self.SizeGB * 1024
 }
 
 func (self *SSnapshot) GetDiskId() string {
diff --git a/pkg/multicloud/zstack/snapshot.go b/pkg/multicloud/zstack/snapshot.go
index d70b0cefe5..94460b611d 100644
--- a/pkg/multicloud/zstack/snapshot.go
+++ b/pkg/multicloud/zstack/snapshot.go
@@ -55,7 +55,7 @@ func (snapshot *SSnapshot) GetStatus() string {
 	}
 }
 
-func (snapshot *SSnapshot) GetSize() int32 {
+func (snapshot *SSnapshot) GetSizeMb() int32 {
 	return int32(snapshot.Size / 1024 / 1024)
 }