diff --git a/Change-sidebar-background-size.patch b/Change-sidebar-background-size.patch
new file mode 100644
index 0000000000000000000000000000000000000000..c71f787890174b4092a5250589fd9131022d3622
--- /dev/null
+++ b/Change-sidebar-background-size.patch
@@ -0,0 +1,24 @@
+From 407e03ec54d6abbce265d7127bab863602e38720 Mon Sep 17 00:00:00 2001
+From: wangce <wangce@uniontech.com>
+Date: Tue, 10 Aug 2021 09:36:35 +0600
+Subject: [PATCH 2/2] Change sidebar background size
+
+---
+ data/anaconda-gtk.css | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/data/anaconda-gtk.css b/data/anaconda-gtk.css
+index 85119ea..2f6963d 100644
+--- a/data/anaconda-gtk.css
++++ b/data/anaconda-gtk.css
+@@ -107,6 +107,7 @@ infobar.error {
+     background-image: url('/usr/share/anaconda/pixmaps/sidebar-bg.png');
+     background-color: @product_bg_color;
+     background-repeat: no-repeat;
++    background-size: 100% 100%;
+ }
+ 
+ /* Add a logo to the sidebar */
+-- 
+2.23.0
+
diff --git a/anaconda.spec b/anaconda.spec
index 1999342f804553f4bc06d0c1b0b0df78c8746679..b4f4a583cd82e7a4e3a4fef441f7d299754fba30 100644
--- a/anaconda.spec
+++ b/anaconda.spec
@@ -4,7 +4,7 @@
 %endif
 Name:    anaconda
 Version: 33.19
-Release: 29
+Release: 30
 Summary: Graphical system installer
 License: GPLv2+ and MIT
 URL:     http://fedoraproject.org/wiki/Anaconda
@@ -59,6 +59,7 @@ Patch6019:    ntp-servers-improve-010-Add-support-for-the-timesource-kickstart-c
 
 Patch9024:    Change-length-limit-of-hostname-from-255-to-64.patch
 Patch9025:    Change-topbar-background-size.patch
+Patch9026:    Change-sidebar-background-size.patch
 
 Patch6020:    bugfix-Schedule-timed-actions-with-the-right-selector-18516.patch
 Patch6021:    bugfix-Reset-the-state-of-the-custom-partitioning-spoke.patch
@@ -332,6 +333,12 @@ update-desktop-database &> /dev/null || :
 %{_datadir}/gtk-doc
 
 %changelog
+* Mon Aug 16 2021 wangce <wangce@uniontech.com> - 33.19-30
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:Change sidebar background size
+
 * Sat Aug 7 2021 zhujunhao <zhujunhao8@huawei.com> - 33.19-29
 - Type:bugfix
 - ID:NA