diff --git a/hutool-extra/src/main/java/cn/hutool/extra/ssh/Sftp.java b/hutool-extra/src/main/java/cn/hutool/extra/ssh/Sftp.java
index b4c58e5ae..c7a74bde7 100755
--- a/hutool-extra/src/main/java/cn/hutool/extra/ssh/Sftp.java
+++ b/hutool-extra/src/main/java/cn/hutool/extra/ssh/Sftp.java
@@ -692,7 +692,9 @@ public class Sftp extends AbstractFtp {
 	@Override
 	public void close() {
 		JschUtil.close(this.channel);
+		this.channel = null;
 		JschUtil.close(this.session);
+		this.session = null;
 	}
 
 	@Override