diff --git a/pkg/nazalog/log.go b/pkg/nazalog/log.go
index 57dc516..6121c4d 100644
--- a/pkg/nazalog/log.go
+++ b/pkg/nazalog/log.go
@@ -214,13 +214,7 @@ func (l *logger) Out(level Level, calldepth int, s string) {
 		writeTime(&l.core.buf, now, l.core.option.TimestampWithMsFlag)
 	}
 
-	if l.core.option.LevelFlag {
-		if l.core.console != nil {
-			l.core.buf.WriteString(levelToColorString[level])
-		} else {
-			l.core.buf.WriteString(levelToString[level])
-		}
-	}
+	l.writeLevelStringIfNeeded(level)
 
 	if l.prefixs != nil {
 		for _, s := range l.prefixs {
diff --git a/pkg/nazalog/log__unix.go b/pkg/nazalog/log__unix.go
new file mode 100644
index 0000000..e13b259
--- /dev/null
+++ b/pkg/nazalog/log__unix.go
@@ -0,0 +1,22 @@
+// Copyright 2024, 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)
+
+//go:build linux || darwin || netbsd || freebsd || openbsd || dragonfly
+// +build linux darwin netbsd freebsd openbsd dragonfly
+
+package nazalog
+
+func (l *logger) writeLevelStringIfNeeded(level Level) {
+	if l.core.option.LevelFlag {
+		if l.core.console != nil {
+			l.core.buf.WriteString(levelToColorString[level])
+		} else {
+			l.core.buf.WriteString(levelToString[level])
+		}
+	}
+}
diff --git a/pkg/nazalog/log__windows.go b/pkg/nazalog/log__windows.go
new file mode 100644
index 0000000..5a9bdbc
--- /dev/null
+++ b/pkg/nazalog/log__windows.go
@@ -0,0 +1,19 @@
+// Copyright 2024, 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)
+
+//go:build windows
+// +build windows
+
+package nazalog
+
+func (l *logger) writeLevelStringIfNeeded(level Level) {
+	if l.core.option.LevelFlag {
+		// windows系统不用写带颜色的日志级别字段
+		l.core.buf.WriteString(levelToString[level])
+	}
+}