diff --git a/pkg/saga/statemachine/engine/contant.go b/pkg/saga/statemachine/constant/contant.go
similarity index 98%
rename from pkg/saga/statemachine/engine/contant.go
rename to pkg/saga/statemachine/constant/contant.go
index 9527fc29..39cb2924 100644
--- a/pkg/saga/statemachine/engine/contant.go
+++ b/pkg/saga/statemachine/constant/contant.go
@@ -1,4 +1,4 @@
-package engine
+package constant
 
 const (
 	VarNameProcessType         string = "_ProcessType_"
diff --git a/pkg/saga/statemachine/engine/process_ctrl/bussiness_processor.go b/pkg/saga/statemachine/engine/process_ctrl/bussiness_processor.go
index 198092a1..c12a7c79 100644
--- a/pkg/saga/statemachine/engine/process_ctrl/bussiness_processor.go
+++ b/pkg/saga/statemachine/engine/process_ctrl/bussiness_processor.go
@@ -3,7 +3,7 @@ package process_ctrl
 import (
 	"context"
 	"github.com/pkg/errors"
-	"github.com/seata/seata-go/pkg/saga/statemachine/engine"
+	"github.com/seata/seata-go/pkg/saga/statemachine/constant"
 	"sync"
 )
 
@@ -76,9 +76,9 @@ func (d *DefaultBusinessProcessor) getRouterHandler(processType ProcessType) (Ro
 }
 
 func (d *DefaultBusinessProcessor) matchProcessType(processContext ProcessContext) ProcessType {
-	ok := processContext.HasVariable(engine.VarNameProcessType)
+	ok := processContext.HasVariable(constant.VarNameProcessType)
 	if ok {
-		return processContext.GetVariable(engine.VarNameProcessType).(ProcessType)
+		return processContext.GetVariable(constant.VarNameProcessType).(ProcessType)
 	}
 	return StateLang
 }
diff --git a/pkg/saga/statemachine/engine/process_ctrl/instruction/instruction.go b/pkg/saga/statemachine/engine/process_ctrl/instruction.go
similarity index 70%
rename from pkg/saga/statemachine/engine/process_ctrl/instruction/instruction.go
rename to pkg/saga/statemachine/engine/process_ctrl/instruction.go
index 1537dc67..2f7c0a54 100644
--- a/pkg/saga/statemachine/engine/process_ctrl/instruction/instruction.go
+++ b/pkg/saga/statemachine/engine/process_ctrl/instruction.go
@@ -1,7 +1,6 @@
-package instruction
+package process_ctrl
 
 import (
-	"github.com/seata/seata-go/pkg/saga/statemachine/engine/process_ctrl"
 	"github.com/seata/seata-go/pkg/saga/statemachine/statelang"
 )
 
@@ -15,7 +14,7 @@ type StateInstruction struct {
 	End              bool
 }
 
-func (s StateInstruction) GetState(context process_ctrl.ProcessContext) (statelang.State, error) {
+func (s StateInstruction) GetState(context ProcessContext) (statelang.State, error) {
 	//TODO implement me
 	panic("implement me")
 }
diff --git a/pkg/saga/statemachine/engine/process_ctrl/process_context.go b/pkg/saga/statemachine/engine/process_ctrl/process_context.go
index 6531b1af..c13faa3f 100644
--- a/pkg/saga/statemachine/engine/process_ctrl/process_context.go
+++ b/pkg/saga/statemachine/engine/process_ctrl/process_context.go
@@ -1,9 +1,6 @@
 package process_ctrl
 
 import (
-	"github.com/seata/seata-go/pkg/saga/statemachine/engine"
-	"github.com/seata/seata-go/pkg/saga/statemachine/engine/process_ctrl/instruction"
-	"github.com/seata/seata-go/pkg/saga/statemachine/statelang"
 	"sync"
 )
 
@@ -20,9 +17,9 @@ type ProcessContext interface {
 
 	HasVariable(name string) bool
 
-	GetInstruction() instruction.Instruction
+	GetInstruction() Instruction
 
-	SetInstruction(instruction instruction.Instruction)
+	SetInstruction(instruction Instruction)
 }
 
 type HierarchicalProcessContext interface {
@@ -47,7 +44,7 @@ type ProcessContextImpl struct {
 	parent      ProcessContext
 	mu          sync.RWMutex
 	mp          map[string]interface{}
-	instruction instruction.Instruction
+	instruction Instruction
 }
 
 func (p *ProcessContextImpl) GetVariable(name string) interface{} {
@@ -140,11 +137,11 @@ func (p *ProcessContextImpl) HasVariable(name string) bool {
 	return false
 }
 
-func (p *ProcessContextImpl) GetInstruction() instruction.Instruction {
+func (p *ProcessContextImpl) GetInstruction() Instruction {
 	return p.instruction
 }
 
-func (p *ProcessContextImpl) SetInstruction(instruction instruction.Instruction) {
+func (p *ProcessContextImpl) SetInstruction(instruction Instruction) {
 	p.instruction = instruction
 }
 
@@ -203,82 +200,3 @@ func (p *ProcessContextImpl) ClearLocally() {
 
 	p.mp = map[string]interface{}{}
 }
-
-// ProcessContextBuilder process_ctrl builder
-type ProcessContextBuilder struct {
-	processContext ProcessContext
-}
-
-func NewProcessContextBuilder() *ProcessContextBuilder {
-	processContextImpl := &ProcessContextImpl{}
-	return &ProcessContextBuilder{processContextImpl}
-}
-
-func (p *ProcessContextBuilder) WithProcessType(processType ProcessType) *ProcessContextBuilder {
-	p.processContext.SetVariable(engine.VarNameProcessType, processType)
-	return p
-}
-
-func (p *ProcessContextBuilder) WithOperationName(operationName string) *ProcessContextBuilder {
-	p.processContext.SetVariable(engine.VarNameOperationName, operationName)
-	return p
-}
-
-func (p *ProcessContextBuilder) WithAsyncCallback(callBack engine.CallBack) *ProcessContextBuilder {
-	if callBack != nil {
-		p.processContext.SetVariable(engine.VarNameAsyncCallback, callBack)
-	}
-
-	return p
-}
-
-func (p *ProcessContextBuilder) WithInstruction(instruction instruction.Instruction) *ProcessContextBuilder {
-	if instruction != nil {
-		p.processContext.SetInstruction(instruction)
-	}
-
-	return p
-}
-
-func (p *ProcessContextBuilder) WithStateMachineInstance(stateMachineInstance statelang.StateMachineInstance) *ProcessContextBuilder {
-	if stateMachineInstance != nil {
-		p.processContext.SetVariable(engine.VarNameStateMachineInst, stateMachineInstance)
-		p.processContext.SetVariable(engine.VarNameStateMachine, stateMachineInstance.StateMachine())
-	}
-
-	return p
-}
-
-func (p *ProcessContextBuilder) WithStateMachineEngine(stateMachineEngine engine.StateMachineEngine) *ProcessContextBuilder {
-	if stateMachineEngine != nil {
-		p.processContext.SetVariable(engine.VarNameStateMachineEngine, stateMachineEngine)
-	}
-
-	return p
-}
-
-func (p *ProcessContextBuilder) WithStateMachineConfig(stateMachineConfig engine.StateMachineConfig) *ProcessContextBuilder {
-	if stateMachineConfig != nil {
-		p.processContext.SetVariable(engine.VarNameStateMachineConfig, stateMachineConfig)
-	}
-
-	return p
-}
-
-func (p *ProcessContextBuilder) WithStateMachineContextVariables(contextMap map[string]interface{}) *ProcessContextBuilder {
-	if contextMap != nil {
-		p.processContext.SetVariable(engine.VarNameStateMachineContext, contextMap)
-	}
-
-	return p
-}
-
-func (p *ProcessContextBuilder) WithIsAsyncExecution(async bool) *ProcessContextBuilder {
-	p.processContext.SetVariable(engine.VarNameIsAsyncExecution, async)
-
-	return p
-}
-
-func (p *ProcessContextBuilder) Build() ProcessContext {
-	return p.processContext
-}
diff --git a/pkg/saga/statemachine/engine/process_ctrl/statemachine_processor.go b/pkg/saga/statemachine/engine/process_ctrl/statemachine_processor.go
index ce3479c3..66338fd8 100644
--- a/pkg/saga/statemachine/engine/process_ctrl/statemachine_processor.go
+++ b/pkg/saga/statemachine/engine/process_ctrl/statemachine_processor.go
@@ -3,7 +3,6 @@ package process_ctrl
 import (
 	"context"
 	"github.com/pkg/errors"
-	"github.com/seata/seata-go/pkg/saga/statemachine/engine/process_ctrl/instruction"
 	"sync"
 )
 
@@ -40,7 +39,7 @@ func NewStateMachineProcessHandler() *StateMachineProcessHandler {
 }
 
 func (s *StateMachineProcessHandler) Process(ctx context.Context, processContext ProcessContext) error {
-	stateInstruction, _ := processContext.GetInstruction().(instruction.StateInstruction)
+	stateInstruction, _ := processContext.GetInstruction().(StateInstruction)
 
 	state, err := stateInstruction.GetState(processContext)
 	if err != nil {
@@ -107,7 +106,7 @@ type StateMachineRouterHandler struct {
 }
 
 func (s *StateMachineRouterHandler) Route(ctx context.Context, processContext ProcessContext) error {
-	stateInstruction, _ := processContext.GetInstruction().(instruction.StateInstruction)
+	stateInstruction, _ := processContext.GetInstruction().(StateInstruction)
 
 	state, err := stateInstruction.GetState(processContext)
 	if err != nil {
diff --git a/pkg/saga/statemachine/engine/process_ctrl_statemachine_engine.go b/pkg/saga/statemachine/engine/process_ctrl_statemachine_engine.go
index 4c115df1..afec63cb 100644
--- a/pkg/saga/statemachine/engine/process_ctrl_statemachine_engine.go
+++ b/pkg/saga/statemachine/engine/process_ctrl_statemachine_engine.go
@@ -3,9 +3,9 @@ package engine
 import (
 	"context"
 	"github.com/pkg/errors"
+	"github.com/seata/seata-go/pkg/saga/statemachine/constant"
 	"github.com/seata/seata-go/pkg/saga/statemachine/engine/events"
 	"github.com/seata/seata-go/pkg/saga/statemachine/engine/process_ctrl"
-	"github.com/seata/seata-go/pkg/saga/statemachine/engine/process_ctrl/instruction"
 	"github.com/seata/seata-go/pkg/saga/statemachine/statelang"
 	"time"
 )
@@ -29,11 +29,11 @@ func (p ProcessCtrlStateMachineEngine) startInternal(ctx context.Context, stateM
 	}
 
 	// Build the process_ctrl context.
-	processContextBuilder := process_ctrl.NewProcessContextBuilder().
+	processContextBuilder := NewProcessContextBuilder().
 		WithProcessType(process_ctrl.StateLang).
-		WithOperationName(OperationNameStart).
+		WithOperationName(constant.OperationNameStart).
 		WithAsyncCallback(callback).
-		WithInstruction(instruction.NewStateInstruction(stateMachineName, tenantId)).
+		WithInstruction(process_ctrl.NewStateInstruction(stateMachineName, tenantId)).
 		WithStateMachineInstance(stateMachineInstance).
 		WithStateMachineConfig(p.StateMachineConfig).
 		WithStateMachineEngine(p).
@@ -53,7 +53,7 @@ func (p ProcessCtrlStateMachineEngine) startInternal(ctx context.Context, stateM
 	}
 
 	if stateMachineInstance.ID() == "" {
-		stateMachineInstance.SetID(p.StateMachineConfig.SeqGenerator().GenerateId(SeqEntityStateMachineInst, ""))
+		stateMachineInstance.SetID(p.StateMachineConfig.SeqGenerator().GenerateId(constant.SeqEntityStateMachineInst, ""))
 	}
 
 	var eventPublisher events.EventPublisher
@@ -97,16 +97,16 @@ func (p ProcessCtrlStateMachineEngine) createMachineInstance(stateMachineName st
 	stateMachineInstance.SetStartParams(startParams)
 	if startParams != nil {
 		if businessKey != "" {
-			startParams[VarNameBusinesskey] = businessKey
+			startParams[constant.VarNameBusinesskey] = businessKey
 		}
 
-		if startParams[VarNameParentId] != nil {
-			parentId, ok := startParams[VarNameParentId].(string)
+		if startParams[constant.VarNameParentId] != nil {
+			parentId, ok := startParams[constant.VarNameParentId].(string)
 			if !ok {
 
 			}
 			stateMachineInstance.SetParentID(parentId)
-			delete(startParams, VarNameParentId)
+			delete(startParams, constant.VarNameParentId)
 		}
 	}
 
diff --git a/pkg/saga/statemachine/engine/statemachine_engine_test.go b/pkg/saga/statemachine/engine/statemachine_engine_test.go
new file mode 100644
index 00000000..c9ac2518
--- /dev/null
+++ b/pkg/saga/statemachine/engine/statemachine_engine_test.go
@@ -0,0 +1,7 @@
+package engine
+
+import "testing"
+
+func TestEngine(t *testing.T) {
+
+}
diff --git a/pkg/saga/statemachine/engine/utils.go b/pkg/saga/statemachine/engine/utils.go
new file mode 100644
index 00000000..654e319d
--- /dev/null
+++ b/pkg/saga/statemachine/engine/utils.go
@@ -0,0 +1,86 @@
+package engine
+
+import (
+	"github.com/seata/seata-go/pkg/saga/statemachine/constant"
+	"github.com/seata/seata-go/pkg/saga/statemachine/engine/process_ctrl"
+	"github.com/seata/seata-go/pkg/saga/statemachine/statelang"
+)
+
+// ProcessContextBuilder process_ctrl builder
+type ProcessContextBuilder struct {
+	processContext process_ctrl.ProcessContext
+}
+
+func NewProcessContextBuilder() *ProcessContextBuilder {
+	processContextImpl := &process_ctrl.ProcessContextImpl{}
+	return &ProcessContextBuilder{processContextImpl}
+}
+
+func (p *ProcessContextBuilder) WithProcessType(processType process_ctrl.ProcessType) *ProcessContextBuilder {
+	p.processContext.SetVariable(constant.VarNameProcessType, processType)
+	return p
+}
+
+func (p *ProcessContextBuilder) WithOperationName(operationName string) *ProcessContextBuilder {
+	p.processContext.SetVariable(constant.VarNameOperationName, operationName)
+	return p
+}
+
+func (p *ProcessContextBuilder) WithAsyncCallback(callBack CallBack) *ProcessContextBuilder {
+	if callBack != nil {
+		p.processContext.SetVariable(constant.VarNameAsyncCallback, callBack)
+	}
+
+	return p
+}
+
+func (p *ProcessContextBuilder) WithInstruction(instruction process_ctrl.Instruction) *ProcessContextBuilder {
+	if instruction != nil {
+		p.processContext.SetInstruction(instruction)
+	}
+
+	return p
+}
+
+func (p *ProcessContextBuilder) WithStateMachineInstance(stateMachineInstance statelang.StateMachineInstance) *ProcessContextBuilder {
+	if stateMachineInstance != nil {
+		p.processContext.SetVariable(constant.VarNameStateMachineInst, stateMachineInstance)
+		p.processContext.SetVariable(constant.VarNameStateMachine, stateMachineInstance.StateMachine())
+	}
+
+	return p
+}
+
+func (p *ProcessContextBuilder) WithStateMachineEngine(stateMachineEngine StateMachineEngine) *ProcessContextBuilder {
+	if stateMachineEngine != nil {
+		p.processContext.SetVariable(constant.VarNameStateMachineEngine, stateMachineEngine)
+	}
+
+	return p
+}
+
+func (p *ProcessContextBuilder) WithStateMachineConfig(stateMachineConfig StateMachineConfig) *ProcessContextBuilder {
+	if stateMachineConfig != nil {
+		p.processContext.SetVariable(constant.VarNameStateMachineConfig, stateMachineConfig)
+	}
+
+	return p
+}
+
+func (p *ProcessContextBuilder) WithStateMachineContextVariables(contextMap map[string]interface{}) *ProcessContextBuilder {
+	if contextMap != nil {
+		p.processContext.SetVariable(constant.VarNameStateMachineContext, contextMap)
+	}
+
+	return p
+}
+
+func (p *ProcessContextBuilder) WithIsAsyncExecution(async bool) *ProcessContextBuilder {
+	p.processContext.SetVariable(constant.VarNameIsAsyncExecution, async)
+
+	return p
+}
+
+func (p *ProcessContextBuilder) Build() process_ctrl.ProcessContext {
+	return p.processContext
+}