diff --git a/pkg/hostman/guestman/guesttasks.go b/pkg/hostman/guestman/guesttasks.go
index 6789e40bb9..1d8ced91c9 100644
--- a/pkg/hostman/guestman/guesttasks.go
+++ b/pkg/hostman/guestman/guesttasks.go
@@ -2397,6 +2397,7 @@ func (task *SGuestHotplugCpuMemTask) onAddMemDevice(reason string) {
 
 func (task *SGuestHotplugCpuMemTask) updateGuestDesc() {
 	task.Desc.Cpu += int64(task.addedCpuCount)
+	task.Desc.CpuDesc.Cpus += uint(task.addedCpuCount)
 	task.Desc.Mem += int64(task.addedMemSize)
 	if task.addedMemSize > 0 {
 		if task.Desc.MemDesc.MemSlots == nil {
diff --git a/pkg/hostman/guestman/qemu-kvm.go b/pkg/hostman/guestman/qemu-kvm.go
index 51b0247aa1..240a5ffca5 100644
--- a/pkg/hostman/guestman/qemu-kvm.go
+++ b/pkg/hostman/guestman/qemu-kvm.go
@@ -2062,9 +2062,8 @@ func (s *SKVMGuestInstance) SyncConfig(
 		return nil, nil
 	}
 
-	// update guest live desc
-	s.Desc.Cpu = guestDesc.Cpu
-	s.Desc.Mem = guestDesc.Mem
+	// update guest live desc, don't be here update cpu and mem
+	// cpu and memory should update from SGuestHotplugCpuMemTask
 	s.Desc.SGuestControlDesc = guestDesc.SGuestControlDesc
 	s.Desc.SGuestProjectDesc = guestDesc.SGuestProjectDesc
 	s.Desc.SGuestRegionDesc = guestDesc.SGuestRegionDesc