diff --git a/src/std/pool/mod.rs b/src/std/pool/mod.rs
index 814145a..40c8559 100644
--- a/src/std/pool/mod.rs
+++ b/src/std/pool/mod.rs
@@ -46,6 +46,7 @@ impl Pool {
         self.idle.0.send(Some(Arc::new(task)));
     }
 
+    /// close just now
     pub fn close(&self) {
         while self.idle.1.remain() > 0 {
             self.idle.1.try_recv();
@@ -53,6 +54,11 @@ impl Pool {
         self.idle.0.send(None);
     }
 
+    /// close when all task finish
+    pub fn close_finish(&self) {
+        self.idle.0.send(None);
+    }
+
     pub fn is_close(&self) -> bool {
         self.closed.load(Ordering::SeqCst)
     }