diff --git a/cmd/hz/generator/custom_files.go b/cmd/hz/generator/custom_files.go
index 1315948f1..5c7fcb0b9 100644
--- a/cmd/hz/generator/custom_files.go
+++ b/cmd/hz/generator/custom_files.go
@@ -369,7 +369,7 @@ func (pkgGen *HttpPackageGenerator) genLoopService(tplInfo *Template, filePathRe
 					}
 					logs.Infof("append content for file '%s', because the update behavior is 'Append' and appendKey is 'method'", filePath)
 					pkgGen.files = append(pkgGen.files, File{filePath, buf.String(), false, ""})
-				} else { // 'append location', append new content after 'append location'
+				} else { // 'append location', append new content before or after 'append location'
 					part := bytes.Split(fileContent, []byte(tplInfo.UpdateBehavior.AppendLocation))
 					if len(part) == 0 {
 						return fmt.Errorf("can not find append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
@@ -378,7 +378,11 @@ func (pkgGen *HttpPackageGenerator) genLoopService(tplInfo *Template, filePathRe
 						return fmt.Errorf("do not support multiple append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
 					}
 					buf := bytes.NewBuffer(nil)
-					err = writeBytes(buf, part[0], []byte(tplInfo.UpdateBehavior.AppendLocation), appendContent, part[1])
+					if tplInfo.UpdateBehavior.AppendDirection == Before {
+						err = writeBytes(buf, part[0], appendContent, []byte(tplInfo.UpdateBehavior.AppendLocation), part[1])
+					} else {
+						err = writeBytes(buf, part[0], []byte(tplInfo.UpdateBehavior.AppendLocation), appendContent, part[1])
+					}
 					if err != nil {
 						return fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
 					}
@@ -546,7 +550,7 @@ func (pkgGen *HttpPackageGenerator) genSingleCustomizedFile(tplInfo *Template, f
 					}
 					logs.Infof("append content for file '%s', because the update behavior is 'Append' and appendKey is 'method'", filePath)
 					pkgGen.files = append(pkgGen.files, File{filePath, buf.String(), false, ""})
-				} else { // 'append location', append new content after 'append location'
+				} else { // 'append location', append new content before or after 'append location'
 					part := bytes.Split(fileContent, []byte(tplInfo.UpdateBehavior.AppendLocation))
 					if len(part) == 0 {
 						return fmt.Errorf("can not find append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
@@ -555,7 +559,11 @@ func (pkgGen *HttpPackageGenerator) genSingleCustomizedFile(tplInfo *Template, f
 						return fmt.Errorf("do not support multiple append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
 					}
 					buf := bytes.NewBuffer(nil)
-					err = writeBytes(buf, part[0], []byte(tplInfo.UpdateBehavior.AppendLocation), appendContent, part[1])
+					if tplInfo.UpdateBehavior.AppendDirection == Before {
+						err = writeBytes(buf, part[0], appendContent, []byte(tplInfo.UpdateBehavior.AppendLocation), part[1])
+					} else {
+						err = writeBytes(buf, part[0], []byte(tplInfo.UpdateBehavior.AppendLocation), appendContent, part[1])
+					}
 					if err != nil {
 						return fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
 					}
@@ -608,7 +616,7 @@ func (pkgGen *HttpPackageGenerator) genSingleCustomizedFile(tplInfo *Template, f
 					}
 					logs.Infof("append content for file '%s', because the update behavior is 'Append' and appendKey is 'service'", filePath)
 					pkgGen.files = append(pkgGen.files, File{filePath, buf.String(), false, ""})
-				} else { // 'append location', append new content after 'append location'
+				} else { // 'append location', append new content before or after 'append location'
 					part := bytes.Split(fileContent, []byte(tplInfo.UpdateBehavior.AppendLocation))
 					if len(part) == 0 {
 						return fmt.Errorf("can not find append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
@@ -617,7 +625,11 @@ func (pkgGen *HttpPackageGenerator) genSingleCustomizedFile(tplInfo *Template, f
 						return fmt.Errorf("do not support multiple append location '%s' for file '%s'\n", tplInfo.UpdateBehavior.AppendLocation, filePath)
 					}
 					buf := bytes.NewBuffer(nil)
-					err = writeBytes(buf, part[0], []byte(tplInfo.UpdateBehavior.AppendLocation), appendContent, part[1])
+					if tplInfo.UpdateBehavior.AppendDirection == Before {
+						err = writeBytes(buf, part[0], appendContent, []byte(tplInfo.UpdateBehavior.AppendLocation), part[1])
+					} else {
+						err = writeBytes(buf, part[0], []byte(tplInfo.UpdateBehavior.AppendLocation), appendContent, part[1])
+					}
 					if err != nil {
 						return fmt.Errorf("write file(%s) failed, err: %v", tplInfo.Path, err)
 					}
diff --git a/cmd/hz/generator/template.go b/cmd/hz/generator/template.go
index b339fbbd2..ee520b7b7 100644
--- a/cmd/hz/generator/template.go
+++ b/cmd/hz/generator/template.go
@@ -40,6 +40,8 @@ const (
 	Skip   = "skip"
 	Cover  = "cover"
 	Append = "append"
+	Before = "before"
+	After  = "after"
 )
 
 type Template struct {
@@ -56,11 +58,12 @@ type Template struct {
 type UpdateBehavior struct {
 	Type string `yaml:"type"` // Update behavior type: skip/cover/append
 	// the following variables are used for append update
-	AppendKey      string   `yaml:"append_key"`         // Append content based in key; for example: 'method'/'service'
-	InsertKey      string   `yaml:"insert_key"`         // Insert content by "insert_key"
-	AppendTpl      string   `yaml:"append_content_tpl"` // Append content if UpdateBehavior is "append"
-	ImportTpl      []string `yaml:"import_tpl"`         // Import insert template
-	AppendLocation string   `yaml:"append_location"`    // AppendLocation specifies the location of append,  the default is the end of the file
+	AppendKey       string   `yaml:"append_key"`         // Append content based in key; for example: 'method'/'service'
+	InsertKey       string   `yaml:"insert_key"`         // Insert content by "insert_key"
+	AppendTpl       string   `yaml:"append_content_tpl"` // Append content if UpdateBehavior is "append"
+	ImportTpl       []string `yaml:"import_tpl"`         // Import insert template
+	AppendLocation  string   `yaml:"append_location"`    // AppendLocation specifies the location of append,  the default is the end of the file
+	AppendDirection string   `yaml:"append_direction"`   // AppendDirection specifies the direction of append, the default is "after", and the other option is "before"
 }
 
 // TemplateGenerator contains information about the output template