diff --git a/main.go b/main.go
index 509c06bdd..ea1225841 100644
--- a/main.go
+++ b/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/hex"
 	"flag"
 	"fmt"
 	"io"
@@ -184,7 +185,7 @@ func handleConn(c net.Conn) {
 			}
 			return
 		}
-		fmt.Println("read data：", string(buffer[:n]))
+		fmt.Println("read data：", hex.EncodeToString(buffer[:n]))
 		b := []byte("ok")
 		c.Write(b)
 	}