diff --git a/scripts/download_console.sh b/scripts/download_console.sh
index ee737e6da..b92cddd52 100644
--- a/scripts/download_console.sh
+++ b/scripts/download_console.sh
@@ -112,7 +112,7 @@ download_release_pkg()
     fi
 
     # download 
-    if [ -f "${release_pkg}" ] && [ "$(md5sum -c ${release_pkg_checksum_file}|echo $?)" -eq "0" ];then
+    if [ -f "${release_pkg}" ] && md5sum -c ${release_pkg_checksum_file}; then
         LOG_INFO "Latest release ${release_pkg} exists."
     else
         LOG_INFO "Try to download from: ${cdn_url}/${compatibility_version}/${release_pkg}"
@@ -122,7 +122,7 @@ download_release_pkg()
             curl -C - -LO ${github_url}/${compatibility_version}/${release_pkg}
         fi
 
-        if [ "$(md5sum -c ${release_pkg_checksum_file}|echo $?)" -ne "0" ]; then
+        if ! md5sum -c ${release_pkg_checksum_file}; then
             LOG_ERROR "Download package error"
             rm -f ${release_pkg}
             exit 1
diff --git a/scripts/download_demo.sh b/scripts/download_demo.sh
index 0d8307b3e..a15b7edfd 100644
--- a/scripts/download_demo.sh
+++ b/scripts/download_demo.sh
@@ -95,8 +95,8 @@ download_release_pkg()
         exit 1
     fi
 
-    # download 
-    if [ -f "${release_pkg}" ] && [ "$(md5sum -c ${release_pkg_checksum_file}|echo $?)" -eq "0" ];then
+    # download
+    if [ -f "${release_pkg}" ] && md5sum -c ${release_pkg_checksum_file}; then
         LOG_INFO "Latest release ${release_pkg} exists."
     else
         LOG_INFO "Try to download from: ${cdn_url}/${compatibility_version}/${release_pkg}"
@@ -106,7 +106,7 @@ download_release_pkg()
             curl -C - -LO ${github_url}/${compatibility_version}/${release_pkg}
         fi
 
-        if [ "$(md5sum -c ${release_pkg_checksum_file}|echo $?)" -ne "0" ]; then
+        if ! md5sum -c ${release_pkg_checksum_file}; then
             LOG_ERROR "Download package error"
             rm -f ${release_pkg}
             exit 1
diff --git a/scripts/download_wecross.sh b/scripts/download_wecross.sh
index 0087596a7..aa24509ea 100644
--- a/scripts/download_wecross.sh
+++ b/scripts/download_wecross.sh
@@ -75,25 +75,6 @@ done
 
 }
 
-parallel_download()
-{
-    #parallel_download WeCross.tar.bz2.md5 https://github.com/WeBankFinTech/WeCross/releases/download/${compatibility_version}
-    md5_file_list=${1}
-    prefix=${2}
-    # shellcheck disable=SC2162
-    
-    while read line;do
-        local part=$(echo ${line}|awk '{print $2}')
-        curl -s -C - -LO ${prefix}/${part} &
-    done < "${md5_file_list}"   
-    wait
-    
-    if [ ! -z "$(md5sum -c ${md5_file_list}|grep FAILED)" ];then
-        LOG_ERROR "Download WeCross package failed! URL: ${prefix}"
-        exit 1
-    fi
-}
-
 download_wecross_pkg()
 {
     local github_url=https://github.com/WeBankFinTech/WeCross/releases/download/
@@ -142,7 +123,7 @@ download_release_pkg()
     fi
 
     # download 
-    if [ -f "${release_pkg}" ] && [ "$(md5sum -c ${release_pkg_checksum_file}|echo $?)" -eq "0" ];then
+    if [ -f "${release_pkg}" ] && md5sum -c ${release_pkg_checksum_file}; then
         LOG_INFO "Latest release ${release_pkg} exists."
     else
         LOG_INFO "Try to download from: ${cdn_url}/${compatibility_version}/${release_pkg}"
@@ -152,7 +133,7 @@ download_release_pkg()
             curl -C - -LO ${github_url}/${compatibility_version}/${release_pkg}
         fi
 
-        if [ "$(md5sum -c ${release_pkg_checksum_file}|echo $?)" -ne "0" ]; then
+        if ! md5sum -c ${release_pkg_checksum_file}; then
             LOG_ERROR "Download package error"
             rm -f ${release_pkg}
             exit 1