diff --git a/pkg/apis/compute/api.go b/pkg/apis/compute/api.go
index ab775eee48..8b980918be 100644
--- a/pkg/apis/compute/api.go
+++ b/pkg/apis/compute/api.go
@@ -396,6 +396,10 @@ type ServerCreateInput struct {
 	// emulate: BIOS, UEFI
 	Bios string `json:"bios"`
 
+	// Machine类型
+	// emulate: pc, q35
+	Machine string `json:"machine"`
+
 	// 启动顺序
 	// c: cdrome
 	// d: disk
diff --git a/pkg/apis/compute/guest_const.go b/pkg/apis/compute/guest_const.go
index 9069651f2b..2aac3222dd 100644
--- a/pkg/apis/compute/guest_const.go
+++ b/pkg/apis/compute/guest_const.go
@@ -176,6 +176,11 @@ const (
 	CPU_MODE_HOST = "host"
 )
 
+const (
+	VM_MACHINE_TYPE_PC  = "pc"
+	VM_MACHINE_TYPE_Q35 = "q35"
+)
+
 var VM_RUNNING_STATUS = []string{VM_START_START, VM_STARTING, VM_RUNNING, VM_BLOCK_STREAM, VM_BLOCK_STREAM_FAIL}
 var VM_CREATING_STATUS = []string{VM_CREATE_NETWORK, VM_CREATE_DISK, VM_START_DEPLOY, VM_DEPLOYING}
 
diff --git a/pkg/compute/guestdrivers/virtualization.go b/pkg/compute/guestdrivers/virtualization.go
index 6aef096b8b..607b490544 100644
--- a/pkg/compute/guestdrivers/virtualization.go
+++ b/pkg/compute/guestdrivers/virtualization.go
@@ -255,7 +255,29 @@ func (self *SVirtualizedGuestDriver) RequestStopGuestForDelete(ctx context.Conte
 	return nil
 }
 
+func (self *SVirtualizedGuestDriver) ValidateMachineType(machine string) error {
+	if !utils.IsInStringArray(machine, []string{api.VM_MACHINE_TYPE_PC, api.VM_MACHINE_TYPE_Q35}) {
+		return httperrors.NewBadRequestError("Invalid machine %q", machine)
+	}
+	return nil
+}
+
 func (self *SVirtualizedGuestDriver) ValidateCreateData(ctx context.Context, userCred mcclient.TokenCredential, input *api.ServerCreateInput) (*api.ServerCreateInput, error) {
+	if input.Machine != "" {
+		if err := self.ValidateMachineType(input.Machine); err != nil {
+			return nil, err
+		}
+	}
+	return input, nil
+}
+
+func (self *SVirtualizedGuestDriver) ValidateUpdateData(ctx context.Context, userCred mcclient.TokenCredential, input *jsonutils.JSONDict) (*jsonutils.JSONDict, error) {
+	machine, _ := input.GetString("machine")
+	if machine != "" {
+		if err := self.ValidateMachineType(machine); err != nil {
+			return nil, err
+		}
+	}
 	return input, nil
 }
 
diff --git a/pkg/hostman/guestman/qemu-kvmhelper.go b/pkg/hostman/guestman/qemu-kvmhelper.go
index c200556079..6304016400 100644
--- a/pkg/hostman/guestman/qemu-kvmhelper.go
+++ b/pkg/hostman/guestman/qemu-kvmhelper.go
@@ -29,6 +29,7 @@ import (
 	"yunion.io/x/pkg/errors"
 	"yunion.io/x/pkg/utils"
 
+	api "yunion.io/x/onecloud/pkg/apis/compute"
 	"yunion.io/x/onecloud/pkg/hostman/options"
 	"yunion.io/x/onecloud/pkg/hostman/storageman"
 	"yunion.io/x/onecloud/pkg/util/fileutils2"
@@ -120,7 +121,7 @@ func (s *SKVMGuestInstance) isWindows10() bool {
 func (s *SKVMGuestInstance) getMachine() string {
 	machine, err := s.Desc.GetString("machine")
 	if err != nil {
-		machine = "pc"
+		machine = api.VM_MACHINE_TYPE_PC
 	}
 	return machine
 }
@@ -134,7 +135,7 @@ func (s *SKVMGuestInstance) getBios() string {
 }
 
 func (s *SKVMGuestInstance) isQ35() bool {
-	return s.getMachine() == "q35"
+	return s.getMachine() == api.VM_MACHINE_TYPE_Q35
 }
 
 func (s *SKVMGuestInstance) GetVdiProtocol() string {
diff --git a/pkg/mcclient/options/servers.go b/pkg/mcclient/options/servers.go
index 23cfb40398..ac7c1e457e 100644
--- a/pkg/mcclient/options/servers.go
+++ b/pkg/mcclient/options/servers.go
@@ -365,6 +365,7 @@ type ServerCreateOptionalOptions struct {
 	Vga              string   `help:"VGA driver" choices:"std|vmware|cirrus|qxl"`
 	Vdi              string   `help:"VDI protocool" choices:"vnc|spice"`
 	Bios             string   `help:"BIOS" choices:"BIOS|UEFI"`
+	Machine          string   `help:"Machine type" choices:"pc|q35"`
 	Desc             string   `help:"Description" metavar:"<DESCRIPTION>" json:"description"`
 	Boot             string   `help:"Boot device" metavar:"<BOOT_DEVICE>" choices:"disk|cdrom" json:"-"`
 	EnableCloudInit  bool     `help:"Enable cloud-init service"`
@@ -468,6 +469,7 @@ func (opts *ServerCreateOptionalOptions) OptionalParams() (*computeapi.ServerCre
 		Vga:                opts.Vga,
 		Vdi:                opts.Vdi,
 		Bios:               opts.Bios,
+		Machine:            opts.Machine,
 		ShutdownBehavior:   opts.ShutdownBehavior,
 		AutoStart:          opts.AutoStart,
 		Duration:           opts.Duration,
@@ -583,6 +585,7 @@ type ServerUpdateOptions struct {
 	Boot             string `help:"Boot device" choices:"disk|cdrom"`
 	Delete           string `help:"Lock server to prevent from deleting" choices:"enable|disable" json:"-"`
 	ShutdownBehavior string `help:"Behavior after VM server shutdown" choices:"stop|terminate"`
+	Machine          string `help:"Machine type" choices:"q35|pc"`
 }
 
 func (opts *ServerUpdateOptions) Params() (jsonutils.JSONObject, error) {