diff --git a/example/src/split_log.rs b/example/src/split_log.rs
index 620467a..9b2dc7a 100644
--- a/example/src/split_log.rs
+++ b/example/src/split_log.rs
@@ -1,13 +1,13 @@
 use fast_log::config::Config;
 use fast_log::consts::LogSize;
-use fast_log::plugin::file_split::KeepType;
+use fast_log::plugin::file_split::{HowPackType, KeepType};
 use fast_log::plugin::packer::LogPacker;
 
 fn main() {
     //file_path also can use '"target/logs/test.log"'
     fast_log::init(Config::new().chan_len(Some(100000)).console().file_split(
         "target/logs/",
-        LogSize::MB(1),
+        HowPackType::BySize(LogSize::KB(500)),
         KeepType::KeepNum(2),
         LogPacker {},
     ))
diff --git a/example/src/split_log_date.rs b/example/src/split_log_date.rs
index 12d8d51..fe78297 100644
--- a/example/src/split_log_date.rs
+++ b/example/src/split_log_date.rs
@@ -1,7 +1,7 @@
 use fast_log::config::Config;
 use fast_log::error::LogError;
 use fast_log::plugin::file_name::FileName;
-use fast_log::plugin::file_split::{HowToPackType, KeepType, Packer};
+use fast_log::plugin::file_split::{HowPackType, KeepType, Packer};
 use std::fs::{File, OpenOptions};
 use std::io::{Read, Write};
 use std::thread::sleep;
@@ -63,7 +63,7 @@ fn main() {
         "target/logs/",
         KeepType::KeepNum(2),
         DateLogPacker {},
-        HowToPackType::ByDate(DateTime::now()),
+        HowPackType::ByDate(DateTime::now()),
     ))
         .unwrap();
     for _ in 0..40000 {
diff --git a/example/src/split_log_gz.rs b/example/src/split_log_gz.rs
index ec12c91..c967de6 100644
--- a/example/src/split_log_gz.rs
+++ b/example/src/split_log_gz.rs
@@ -1,12 +1,12 @@
 use fast_log::config::Config;
 use fast_log::consts::LogSize;
-use fast_log::plugin::file_split::KeepType;
+use fast_log::plugin::file_split::{HowPackType, KeepType};
 use fast_log::plugin::packer::GZipPacker;
 
 fn main() {
     fast_log::init(Config::new().chan_len(Some(100000)).console().file_split(
         "target/logs/",
-        LogSize::KB(50),
+        HowPackType::BySize(LogSize::KB(50)),
         KeepType::KeepNum(5),
         GZipPacker {},
     ))
diff --git a/example/src/split_log_lz4.rs b/example/src/split_log_lz4.rs
index e268fae..d04808b 100644
--- a/example/src/split_log_lz4.rs
+++ b/example/src/split_log_lz4.rs
@@ -1,12 +1,12 @@
 use fast_log::config::Config;
 use fast_log::consts::LogSize;
-use fast_log::plugin::file_split::KeepType;
+use fast_log::plugin::file_split::{HowPackType, KeepType};
 use fast_log::plugin::packer::LZ4Packer;
 
 fn main() {
     fast_log::init(Config::new().chan_len(Some(100000)).console().file_split(
         "target/logs/",
-        LogSize::KB(50),
+        HowPackType::BySize(LogSize::KB(50)),
         KeepType::KeepNum(5),
         LZ4Packer {},
     ))
diff --git a/example/src/split_log_zip.rs b/example/src/split_log_zip.rs
index 3c5caeb..dc39711 100644
--- a/example/src/split_log_zip.rs
+++ b/example/src/split_log_zip.rs
@@ -1,5 +1,5 @@
 use fast_log::consts::LogSize;
-use fast_log::plugin::file_split::KeepType;
+use fast_log::plugin::file_split::{HowPackType, KeepType};
 use fast_log::plugin::packer::ZipPacker;
 
 use fast_log::config::Config;
@@ -7,7 +7,7 @@ use fast_log::config::Config;
 fn main() {
     fast_log::init(Config::new().chan_len(Some(100000)).console().file_split(
         "target/logs/",
-        LogSize::KB(50),
+        HowPackType::BySize(LogSize::KB(50)),
         KeepType::KeepNum(5),
         ZipPacker {},
     ))
diff --git a/src/config.rs b/src/config.rs
index c9126c0..befa30f 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -4,7 +4,7 @@ use crate::filter::Filter;
 use crate::plugin::console::ConsoleAppender;
 use crate::plugin::file::FileAppender;
 use crate::plugin::file_loop::FileLoopAppender;
-use crate::plugin::file_split::{FileSplitAppender, HowToPack, Keep, Packer, RawFile, SplitFile};
+use crate::plugin::file_split::{FileSplitAppender, HowPack, Keep, Packer, RawFile, SplitFile};
 use crate::FastLogFormat;
 use dark_std::sync::SyncVec;
 use log::LevelFilter;
@@ -102,12 +102,12 @@ impl Config {
         self
     }
     /// add a FileSplitAppender
-    pub fn file_split<P: Packer + Sync + 'static, R: Keep + 'static,H:HowToPack+'static>(
+    pub fn file_split<P: Packer + Sync + 'static, R: Keep + 'static,H: HowPack +'static>(
         self,
         file_path: &str,
+        how:H,
         rolling_type: R,
         packer: P,
-        how:H
     ) -> Self {
         self.appends.push(Mutex::new(Box::new(
             FileSplitAppender::new::<RawFile>(
@@ -127,22 +127,22 @@ impl Config {
     /// ```rust
     /// use fast_log::Config;
     /// use fast_log::consts::LogSize;
-    /// use fast_log::plugin::file_split::{HowToPackType, RawFile, RollingType};
+    /// use fast_log::plugin::file_split::{HowPackType, RawFile, RollingType};
     /// use fast_log::plugin::packer::LogPacker;
     /// fn new(){
     ///  fast_log::init(
     ///         Config::new()
     ///             .chan_len(Some(100000))
-    ///             .split::<RawFile, RollingType, LogPacker, HowToPackType>(
+    ///             .split::<RawFile, RollingType, LogPacker, HowPackType>(
     ///                 "target/logs/temp.log",
     ///                 RollingType::All,
     ///                 LogPacker {},
-    ///                 HowToPackType::BySize(LogSize::MB(1)),
+    ///                 HowPackType::BySize(LogSize::MB(1)),
     ///             ),
     ///     );
     /// }
     /// ```
-    pub fn split<F: SplitFile + 'static, R: Keep + 'static, P: Packer + Sync + 'static,H:HowToPack+'static>(
+    pub fn split<F: SplitFile + 'static, R: Keep + 'static, P: Packer + Sync + 'static,H: HowPack +'static>(
         self,
         file_path: &str,
         keeper: R,
diff --git a/src/plugin/file_loop.rs b/src/plugin/file_loop.rs
index 4417d44..223a78c 100644
--- a/src/plugin/file_loop.rs
+++ b/src/plugin/file_loop.rs
@@ -1,7 +1,7 @@
 use crate::appender::{FastLogRecord, LogAppender};
 use crate::consts::LogSize;
 use crate::error::LogError;
-use crate::plugin::file_split::{FileSplitAppender, HowToPackType, KeepType, RawFile};
+use crate::plugin::file_split::{FileSplitAppender, HowPackType, KeepType, RawFile};
 use crate::plugin::packer::LogPacker;
 
 /// Single logs are stored in rolling mode by capacity
@@ -14,7 +14,7 @@ impl FileLoopAppender {
         Ok(Self {
             file: FileSplitAppender::new::<RawFile>(
                 log_file_path,
-                Box::new(HowToPackType::BySize(size)),
+                Box::new(HowPackType::BySize(size)),
                 Box::new(KeepType::KeepNum(1)),
                 Box::new(LogPacker {}),
             )?,
diff --git a/src/plugin/file_split.rs b/src/plugin/file_split.rs
index 9b8ae03..6427ae8 100644
--- a/src/plugin/file_split.rs
+++ b/src/plugin/file_split.rs
@@ -55,7 +55,7 @@ pub trait Packer: Send + Sync {
 }
 
 
-pub trait HowToPack: Send {
+pub trait HowPack: Send {
     fn need_pack(&mut self, temp_size: usize, arg: &FastLogRecord) -> bool;
 }
 
@@ -172,15 +172,15 @@ impl SplitFile for RawFile {
 }
 
 
-pub enum HowToPackType {
+pub enum HowPackType {
     ByDate(DateTime),
     BySize(LogSize),
 }
 
-impl HowToPack for HowToPackType {
+impl HowPack for HowPackType {
     fn need_pack(&mut self, temp_size: usize, arg: &FastLogRecord) -> bool {
         match self {
-            HowToPackType::ByDate(date_time) => {
+            HowPackType::ByDate(date_time) => {
                 let dt = fastdate::DateTime::from_system_time(arg.now, fastdate::offset_sec());
                 if dt.day() > date_time.day() {
                     *date_time = dt;
@@ -189,7 +189,7 @@ impl HowToPack for HowToPackType {
                     return false;
                 }
             }
-            HowToPackType::BySize(limit) => {
+            HowPackType::BySize(limit) => {
                 if temp_size >= limit.get_len() {
                     return true;
                 } else {
@@ -207,7 +207,7 @@ pub struct FileSplitAppender {
     packer: Arc<Box<dyn Packer>>,
     dir_path: String,
     sender: Sender<LogPack>,
-    how_to_pack: Box<dyn HowToPack>,
+    how_to_pack: Box<dyn HowPack>,
     //cache data
     temp_bytes: AtomicUsize,
     temp_name: String,
@@ -216,7 +216,7 @@ pub struct FileSplitAppender {
 impl FileSplitAppender {
     pub fn new<F: SplitFile + 'static>(
         file_path: &str,
-        how_to_pack: Box<dyn HowToPack>,
+        how_to_pack: Box<dyn HowPack>,
         rolling_type: Box<dyn Keep>,
         packer: Box<dyn Packer>,
     ) -> Result<FileSplitAppender, LogError> {
diff --git a/tests/split_test.rs b/tests/split_test.rs
index 97f0623..f84c96d 100644
--- a/tests/split_test.rs
+++ b/tests/split_test.rs
@@ -3,7 +3,7 @@ mod test {
     use fast_log::appender::{Command, FastLogRecord, LogAppender};
     use fast_log::consts::LogSize;
     use fast_log::plugin::file_name::FileName;
-    use fast_log::plugin::file_split::{FileSplitAppender, HowToPackType, Keep, Packer, RawFile, RollingType};
+    use fast_log::plugin::file_split::{FileSplitAppender, HowPackType, Keep, Packer, RawFile, RollingType};
     use fast_log::plugin::packer::LogPacker;
     use fastdate::DateTime;
     use log::Level;
@@ -16,7 +16,7 @@ mod test {
         let _ = remove_dir_all("target/test/");
         let mut appender = FileSplitAppender::new::<RawFile>(
             "target/test/",
-            Box::new(HowToPackType::BySize(LogSize::MB(1))),
+            Box::new(HowPackType::BySize(LogSize::MB(1))),
             Box::new(RollingType::All),
             Box::new(LogPacker {}),
         )