diff --git a/tests/stress/cpu/cpu_calc_power.sh b/tests/stress/cpu/cpu_calc_power.sh
index d87b32eeeb125edd23fa82d788d428c698397207..6960cf805f1e05bc62ab5692ee92b3b9a1700c87 100644
--- a/tests/stress/cpu/cpu_calc_power.sh
+++ b/tests/stress/cpu/cpu_calc_power.sh
@@ -30,10 +30,10 @@ function cpu_calc_power_test() {
     else
         echo "warning: No cpu is online." && test_skip
     fi
-    cpuload_monitor_on_usr $cpu_used_nums &
 
     check_cmd "stress-ng"
-    run_cmd "stress-ng --cpu $cpu_used_nums --cpu-method all --verify --timeout=$RUNTIME"
+    run_cmd "stress-ng --cpu $cpu_used_nums --cpu-method all --verify --timeout=$RUNTIME" &
+    cpuload_monitor_on_usr $cpu_used_nums &
     wait
 
     echo "Check cpu load log"
diff --git a/tests/stress/cpu/cpu_stress.sh b/tests/stress/cpu/cpu_stress.sh
index 02d64426a77c8e94c861e3e35f770c3b5f1c7aac..9bbb3ce9709c6ace21a89077fc58fc21d19c0b0b 100644
--- a/tests/stress/cpu/cpu_stress.sh
+++ b/tests/stress/cpu/cpu_stress.sh
@@ -25,7 +25,7 @@ function cpuload_monitor_on_usr() {
     local has_cpu_on_off_during_stress=${2:-"false"}
     local count=0
     local cur_name
-    local usr_ratio
+    local usr_ratio min_ratio=100
 
     check_cmd "mpstat"
     echo "==================[CPULOAD monitor $(($RUNTIME - 10 ))s]===================" >> $CPU_LOAD_RESULTS_LOG
@@ -36,6 +36,9 @@ function cpuload_monitor_on_usr() {
     fi
     while read line;do
         usr_ratio="$(echo "$line"|awk '{print $3}')"
+        if [ $(echo "$usr_ratio > 10"|bc) -eq 1 ];then
+            [ $(echo "$usr_ratio > $min_ratio"|bc) -eq 1 ] || min_ratio=$usr_ratio
+        fi
         if "$has_cpu_on_off_during_stress";then
             if [ $(echo "$usr_ratio > 20"|bc) -eq 1 ];then
                 ((count++))
@@ -53,7 +56,8 @@ function cpuload_monitor_on_usr() {
     all_average="$(grep all $CPU_LOAD_LOG|awk '{print $3}')"
     error_num="$(echo "scale=3;($cpu_nums - $count)/$cpu_nums"|bc)"
     if [ $count -ge $cpu_nums ] || [ $(echo "$error_num < 0.05"|bc) -eq 1 ] || [ $(top -H -b -n1|grep -w stress-ng-cpu|wc -l) -ge $cpu_nums ] \
-        || (! $has_cpu_on_off_during_stress && [ $(echo "$all_average > 90"|bc) -eq 1 ]) || ( $has_cpu_on_off_during_stress && [ $(echo "$all_average > 20"|bc) -eq 1 ]) ;then
+        || (! $has_cpu_on_off_during_stress && [ $(echo "$all_average > 90"|bc) -eq 1 ]) || ( $has_cpu_on_off_during_stress && [ $(echo "$all_average > 20"|bc) -eq 1 ]) \
+        || (! $has_cpu_on_off_during_stress && [ $(echo "$min_ratio > 20"|bc) -eq 1 ]);then
         echo -e "[CPU FULL lOAD(100.00%),AVERAGE(>20% or 90%),Deviation 5%]: count($count)--->cpu used($cpu_nums)\n$cur_name" >> $CPU_LOAD_RESULTS_LOG
         echo "Average:     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle" >> $CPU_LOAD_RESULTS_LOG
         cat $CPU_LOAD_LOG >> $CPU_LOAD_RESULTS_LOG