diff --git a/script/config/raspi_image/rpmlist b/script/config/raspi_image/rpmlist
index 3c6a98c4258674aa13e33d813a499b07c6bed5f6..f923649cebf73c0cdac002fe3c4dc6bdb9e66b63 100644
--- a/script/config/raspi_image/rpmlist
+++ b/script/config/raspi_image/rpmlist
@@ -18,4 +18,5 @@ raspberrypi-kernel
 raspberrypi-firmware
 raspberrypi-bluetooth
 sudo
+bc
 openEuler-repos
\ No newline at end of file
diff --git a/script/step/make_raspi_image.sh b/script/step/make_raspi_image.sh
index 9967bdbb762479142358108d4e2f5df17cd5d160..e1bf2de960e647270b57e4690cffb1badb41e3c6 100644
--- a/script/step/make_raspi_image.sh
+++ b/script/step/make_raspi_image.sh
@@ -124,10 +124,10 @@ make_rootfs(){
     # dnf --installroot=${rootfs_dir}/ install -y raspberrypi-kernel raspberrypi-firmware openEuler-repos
     set +e
     INSTALL_PACKAGES $CONFIG_RPM_LIST
-    cat ${rootfs_dir}/etc/systemd/timesyncd.conf | grep "^NTP*"
+    cat ${rootfs_dir}/etc/systemd/timesyncd.conf | grep "^NTP=*"
     if [ $? -ne 0 ]; then
-        sed -i 's/#NTP=/NTP=0.cn.pool.ntp.org/g' ${rootfs_dir}/etc/systemd/timesyncd.conf
-        sed -i 's/#FallbackNTP=/FallbackNTP=1.asia.pool.ntp.org 2.asia.pool.ntp.org/g' ${rootfs_dir}/etc/systemd/timesyncd.conf
+        sed -i -e '/^#NTP=/cNTP=0.cn.pool.ntp.org' ${rootfs_dir}/etc/systemd/timesyncd.conf
+        sed -i -e '/^#FallbackNTP=/cFallbackNTP=1.asia.pool.ntp.org 2.asia.pool.ntp.org' ${rootfs_dir}/etc/systemd/timesyncd.conf
     fi
     set -e
     #cp ${euler_dir}/hosts ${rootfs_dir}/etc/hosts
@@ -190,11 +190,13 @@ make_img(){
     mkdir -p ${root_mnt} ${boot_mnt}
     mount -t vfat -o uid=root,gid=root,umask=0000 ${bootp} ${boot_mnt}
     mount -t ext4 ${rootp} ${root_mnt}
+    prefix_len=${#loopX}
+    let prefix_len=prefix_len+13
     fstab_array=("" "" "" "")
     for line in `blkid | grep /dev/mapper/${loopX}p`
     do
         partuuid=${line#*PARTUUID=\"}
-        fstab_array[${line:18:1}]=${partuuid%%\"*}
+        fstab_array[${line:$prefix_len:1}]=${partuuid%%\"*}
     done
     echo "PARTUUID=${fstab_array[3]}  / ext4    defaults,noatime 0 0" > ${rootfs_dir}/etc/fstab
     echo "PARTUUID=${fstab_array[1]}  /boot vfat    defaults,noatime 0 0" >> ${rootfs_dir}/etc/fstab