diff --git a/cups.spec b/cups.spec
index 0fb9eb1d9371de02b6acc9586d73bb513574e5c4..ee7ea2df6d6a1ccf2afeec04e0848c5402484020 100644
--- a/cups.spec
+++ b/cups.spec
@@ -1,7 +1,7 @@
 Name:    cups
 Epoch:   1
 Version: 2.2.13
-Release: 3
+Release: 4
 Summary: CUPS is the standards-based, open source printing system for linux operating systems.
 License: GPLv2+ and LGPLv2+ with exceptions and AML
 Url:     http://www.cups.org/
@@ -9,7 +9,6 @@ Source0: https://github.com/apple/cups/releases/download/v%{VERSION}/cups-%{VERS
 
 Source2: cupsprinter.png
 Source3: cups.logrotate
-Source4: ncp.backend
 Source5: macros.cups
 
 Patch1:  cups-no-gzip-man.patch
@@ -142,7 +141,6 @@ install -d ${RPM_BUILD_ROOT}%{_datadir}/pixmaps ${RPM_BUILD_ROOT}%{_sysconfdir}/
            ${RPM_BUILD_ROOT}%{_rpmconfigdir}/macros.d
 install -p -m 644 %{SOURCE2} ${RPM_BUILD_ROOT}%{_datadir}/pixmaps
 install -p -m 644 %{SOURCE3} ${RPM_BUILD_ROOT}%{_sysconfdir}/logrotate.d/cups
-install -p -m 755 %{SOURCE4} ${RPM_BUILD_ROOT}%{_exec_prefix}/lib/cups/backend/ncp
 install -m 0644 %{SOURCE5} ${RPM_BUILD_ROOT}%{_rpmconfigdir}/macros.d
 
 touch ${RPM_BUILD_ROOT}%{_sysconfdir}/cups/{printers,classes,client,subscriptions}.conf
@@ -326,6 +324,9 @@ rm -f %{_exec_prefix}/lib/cups/backend/smb
 %doc %{_datadir}/%{name}/www/apple-touch-icon.png
 
 %changelog
+* Fri Feb 19 2021 jinzhimin <jinzhimin2@huawei.com> 2.2.13-4
+- remove unused ncp backend
+
 * Tue Sep 1 2020 zhaowei <zhaowei23@huawei.com> 2.2.13-3
 - Type:CVE
 - ID:CVE-2020-3898
diff --git a/ncp.backend b/ncp.backend
deleted file mode 100644
index d57ada1bcf99a05ecc87f3265213a8cbaff73da9..0000000000000000000000000000000000000000
--- a/ncp.backend
+++ /dev/null
@@ -1,51 +0,0 @@
-#!/bin/sh
-# This is a modified version of 'ncpprint'.  It can now be used as a CUPS
-# backend.
-# Modifications:
-# Copyright (C) 2002  Red Hat, inc
-# Copyright (C) 2002  Tim Waugh
-# Before modification: shipped as /usr/share/printconf/util/ncpprint
-
-if [ -z "$*" ]
-then
-  # This is where we would enumerate all the URIs we support.
-  # Patches welcome.
-  exit 0
-fi
-
-FILE=$6
-if [ -z "$FILE" ]
-then
-  FILE=-
-fi
-
-# $DEVICE_URI is 'ncp://[user:password@]server/queue'
-URI=${DEVICE_URI#*://}
-queue=${URI#*/}
-URI=${URI%/$queue}
-server=${URI#*@}
-URI=${URI%$server}
-URI=${URI%@}
-if [ -n "$URI" ]
-then
-  user=${URI%:*}
-  URI=${URI#$user}
-  password=${URI#:}
-fi
-
-#echo user: ${user-(none)}
-#echo password: ${password-(none)}
-#echo server: $server
-#echo queue: $queue
-
-if [ -n "$user" ]
-then
-  if [ -n "$password" ]
-  then
-    /usr/bin/nprint -S "$server" -q "$queue" -U "$user" -P "$password" -N "$FILE" 2>/dev/null
-  else
-    /usr/bin/nprint -S "$server" -q "$queue" -U "$user" -n -N "$FILE" 2>/dev/null
-  fi
-else
-  /usr/bin/nprint -S "$server" -q "$queue" -N "$FILE" 2>/dev/null
-fi