diff --git a/pkg/nazalog/interface.go b/pkg/nazalog/interface.go
new file mode 100644
index 0000000..38f171c
--- /dev/null
+++ b/pkg/nazalog/interface.go
@@ -0,0 +1,122 @@
+// Copyright 2019, Chef.  All rights reserved.
+// https://github.com/q191201771/naza
+//
+// Use of this source code is governed by a MIT-style license
+// that can be found in the License file.
+//
+// Author: Chef (191201771@qq.com)
+
+// package nazalog 日志库
+package nazalog
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"time"
+)
+
+// 1. 带日志级别
+// 2. 可选输出至控制台或文件，也可以同时输出
+// 3. 日志文件支持按天翻转
+//
+// 目前性能和标准库log相当
+
+var LogErr = errors.New("log:fxxk")
+
+type Logger interface {
+	Debugf(format string, v ...interface{})
+	Infof(format string, v ...interface{})
+	Warnf(format string, v ...interface{})
+	Errorf(format string, v ...interface{})
+	Fatalf(format string, v ...interface{}) // 打印日志并退出程序
+	Panicf(format string, v ...interface{})
+
+	Debug(v ...interface{})
+	Info(v ...interface{})
+	Warn(v ...interface{})
+	Error(v ...interface{})
+	Fatal(v ...interface{})
+	Panic(v ...interface{})
+
+	FatalIfErrorNotNil(err error)
+	PanicIfErrorNotNil(err error)
+
+	Outputf(level Level, calldepth int, format string, v ...interface{})
+	Output(level Level, calldepth int, v ...interface{})
+	Out(level Level, calldepth int, s string)
+}
+
+
+type Option struct {
+	Level Level `json:"level"` // 日志级别，大于等于该级别的日志才会被输出
+
+	// 文件输出和控制台输出可同时打开
+	// 控制台输出主要用做开发时调试，打开后level字段使用彩色输出
+	Filename   string `json:"filename"`     // 输出日志文件名，如果为空，则不写日志文件。可包含路径，路径不存在时，将自动创建
+	IsToStdout bool   `json:"is_to_stdout"` // 是否以stdout输出到控制台
+
+	IsRotateDaily bool `json:"is_rotate_daily"` // 日志按天翻转
+
+	ShortFileFlag bool `json:"short_file_flag"` // 是否在每行日志尾部添加源码文件及行号的信息
+}
+
+// 没有配置的属性，将按如下配置
+var defaultOption = Option{
+	Level:         LevelDebug,
+	Filename:      "",
+	IsToStdout:    true,
+	IsRotateDaily: false,
+	ShortFileFlag: true,
+}
+
+type Level uint8
+
+const (
+	_          Level = iota
+	LevelDebug       // 1
+	LevelInfo
+	LevelWarn
+	LevelError
+	LevelFatal
+	LevelPanic
+)
+
+type ModOption func(option *Option)
+
+func New(modOptions ...ModOption) (Logger, error) {
+	var err error
+
+	l := new(logger)
+	l.currRoundTime = time.Now()
+	l.option = defaultOption
+
+	for _, fn := range modOptions {
+		fn(&l.option)
+	}
+
+	if err := validate(l.option); err != nil {
+		return nil, err
+	}
+	if l.option.Filename != "" {
+		l.dir = filepath.Dir(l.option.Filename)
+		if err = os.MkdirAll(l.dir, 0777); err != nil {
+			return nil, err
+		}
+		if l.fp, err = os.OpenFile(l.option.Filename, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666); err != nil {
+			return nil, err
+		}
+	}
+	if l.option.IsToStdout {
+		l.console = os.Stdout
+	}
+
+	return l, nil
+}
+
+func validate(option Option) error {
+	if option.Level < LevelDebug || option.Level > LevelPanic {
+		return LogErr
+	}
+	return nil
+}
diff --git a/pkg/nazalog/log.go b/pkg/nazalog/log.go
index 58976d4..7ec22e9 100644
--- a/pkg/nazalog/log.go
+++ b/pkg/nazalog/log.go
@@ -6,118 +6,18 @@
 //
 // Author: Chef (191201771@qq.com)
 
-// package nazalog 日志库
 package nazalog
 
 import (
 	"bytes"
-	"errors"
 	"fmt"
 	"io"
 	"os"
-	"path/filepath"
 	"runtime"
 	"sync"
 	"time"
 )
 
-// 1. 带日志级别
-// 2. 可选输出至控制台或文件，也可以同时输出
-// 3. 日志文件支持按天翻转
-//
-// 目前性能和标准库log相当
-
-var LogErr = errors.New("log:fxxk")
-
-type Logger interface {
-	Debugf(format string, v ...interface{})
-	Infof(format string, v ...interface{})
-	Warnf(format string, v ...interface{})
-	Errorf(format string, v ...interface{})
-	Fatalf(format string, v ...interface{}) // 打印日志并退出程序
-	Panicf(format string, v ...interface{})
-
-	Debug(v ...interface{})
-	Info(v ...interface{})
-	Warn(v ...interface{})
-	Error(v ...interface{})
-	Fatal(v ...interface{})
-	Panic(v ...interface{})
-
-	FatalIfErrorNotNil(err error)
-	PanicIfErrorNotNil(err error)
-
-	Outputf(level Level, calldepth int, format string, v ...interface{})
-	Output(level Level, calldepth int, v ...interface{})
-	Out(level Level, calldepth int, s string)
-}
-
-type Option struct {
-	Level Level `json:"level"` // 日志级别，大于等于该级别的日志才会被输出
-
-	// 文件输出和控制台输出可同时打开
-	// 控制台输出主要用做开发时调试，打开后level字段使用彩色输出
-	Filename   string `json:"filename"`     // 输出日志文件名，如果为空，则不写日志文件。可包含路径，路径不存在时，将自动创建
-	IsToStdout bool   `json:"is_to_stdout"` // 是否以stdout输出到控制台
-
-	IsRotateDaily bool `json:"is_rotate_daily"` // 日志按天翻转
-
-	ShortFileFlag bool `json:"short_file_flag"` // 是否在每行日志尾部添加源码文件及行号的信息
-}
-
-// 没有配置的属性，将按如下配置
-var defaultOption = Option{
-	Level:         LevelDebug,
-	Filename:      "",
-	IsToStdout:    true,
-	IsRotateDaily: false,
-	ShortFileFlag: true,
-}
-
-type Level uint8
-
-const (
-	_          Level = iota
-	LevelDebug       // 1
-	LevelInfo
-	LevelWarn
-	LevelError
-	LevelFatal
-	LevelPanic
-)
-
-type ModOption func(option *Option)
-
-func New(modOptions ...ModOption) (Logger, error) {
-	var err error
-
-	l := new(logger)
-	l.currRoundTime = time.Now()
-	l.option = defaultOption
-
-	for _, fn := range modOptions {
-		fn(&l.option)
-	}
-
-	if l.option.Level < LevelDebug || l.option.Level > LevelPanic {
-		return nil, LogErr
-	}
-	if l.option.Filename != "" {
-		l.dir = filepath.Dir(l.option.Filename)
-		if err = os.MkdirAll(l.dir, 0777); err != nil {
-			return nil, err
-		}
-		if l.fp, err = os.OpenFile(l.option.Filename, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666); err != nil {
-			return nil, err
-		}
-	}
-	if l.option.IsToStdout {
-		l.console = os.Stdout
-	}
-
-	return l, nil
-}
-
 const (
 	levelDebugString = "DEBUG "
 	levelInfoString  = " INFO "