diff --git a/server/stat/src/constant.rs b/server/stat/src/constant.rs
new file mode 100644
index 0000000..684445a
--- /dev/null
+++ b/server/stat/src/constant.rs
@@ -0,0 +1,3 @@
+pub mod constant;
+
+pub use constant::*;
\ No newline at end of file
diff --git a/server/stat/src/constant/constant.rs b/server/stat/src/constant/constant.rs
new file mode 100644
index 0000000..415dff1
--- /dev/null
+++ b/server/stat/src/constant/constant.rs
@@ -0,0 +1 @@
+pub const MAX_PACKET_LEN: usize = 1024 * 64;
\ No newline at end of file
diff --git a/server/stat/src/listener/wslistener.rs b/server/stat/src/listener/wslistener.rs
index cad9d65..a5bc5d2 100644
--- a/server/stat/src/listener/wslistener.rs
+++ b/server/stat/src/listener/wslistener.rs
@@ -25,7 +25,7 @@ use actix_web::web::Bytes;
 use futures::FutureExt;
 use tokio::io::{AsyncReadExt, Interest};
 use crate::app::UserApp;
-use crate::{MAX_PACKET_LEN};
+use crate::constant;
 use tokio::net::TcpStream;
 use tokio::runtime::Runtime;
 use crate::app::user_app::DownStreamPack;
@@ -78,8 +78,8 @@ impl WsConn {
             }
             while true {
                 let mut read_bytes = buf_len - already_read_bytes;
-                if read_bytes > MAX_PACKET_LEN - self.recv_buf_len {
-                    read_bytes = MAX_PACKET_LEN - self.recv_buf_len;
+                if read_bytes > constant::MAX_PACKET_LEN - self.recv_buf_len {
+                    read_bytes = constant::MAX_PACKET_LEN - self.recv_buf_len;
                 }
                 if read_bytes > 0 {
                     self.recv_buf[self.recv_buf_len..bin.len()].copy_from_slice(&bin);
diff --git a/server/stat/src/main.rs b/server/stat/src/main.rs
index 962e640..86d57f7 100755
--- a/server/stat/src/main.rs
+++ b/server/stat/src/main.rs
@@ -5,9 +5,9 @@ mod listener;
 mod upstream;
 mod downstream;
 mod ss;
-use crate::app::UserApp;
+mod constant;
 
-const MAX_PACKET_LEN: usize = 1024 * 64;
+use crate::app::UserApp;
 
 fn main() {
     App::init(UserApp::instance());