diff --git a/src/appender.rs b/src/appender.rs
index e5b5b59..5c594ae 100644
--- a/src/appender.rs
+++ b/src/appender.rs
@@ -1,8 +1,7 @@
 use crate::appender::Command::CommandRecord;
 use crossbeam_utils::sync::WaitGroup;
 use log::LevelFilter;
-use std::ops::{Add, Sub};
-use std::time::{Duration, SystemTime};
+use std::time::{SystemTime};
 
 /// LogAppender append logs
 /// Appender will be running on single main thread,please do_log for new thread or new an Future
diff --git a/src/fast_log.rs b/src/fast_log.rs
index d159d6b..3e05f17 100644
--- a/src/fast_log.rs
+++ b/src/fast_log.rs
@@ -1,8 +1,8 @@
 use log::{LevelFilter, Log, Metadata, Record};
-use std::ops::{Deref, DerefMut};
+use std::ops::{Deref};
 use std::sync::atomic::{AtomicI32, AtomicI64, Ordering};
 
-use crate::appender::{Command, FastLogRecord, RecordFormat};
+use crate::appender::{Command, FastLogRecord};
 use crate::config::Config;
 use crate::error::LogError;
 use crate::filter::Filter;
diff --git a/src/plugin/file_split.rs b/src/plugin/file_split.rs
index 0531d4f..2515835 100644
--- a/src/plugin/file_split.rs
+++ b/src/plugin/file_split.rs
@@ -6,7 +6,6 @@ use crate::appender::{Command, FastLogRecord, LogAppender};
 use crate::consts::LogSize;
 use crate::error::LogError;
 use crate::{chan, Receiver, Sender};
-use std::ops::Sub;
 use std::str::FromStr;
 use std::time::Duration;