diff --git a/src/main/ui/static/analysis/settle_tasks.js b/src/main/ui/static/analysis/settle_tasks.js
index 5731c2431..294d91159 100644
--- a/src/main/ui/static/analysis/settle_tasks.js
+++ b/src/main/ui/static/analysis/settle_tasks.js
@@ -89,6 +89,16 @@ define(['angular', 'uiBootstrap', 'uiRouter'], function (angular) {
                     $scope.editingTask.whitelist_clients.splice(idx, 1);
                 }
             };
+            $scope.dropTask = function (task) {
+                let index = $scope.currentTasks.indexOf(task);
+                if (index >= 0) {
+                    $scope.currentTasks.splice(index, 1);
+                }
+            }
+
+            $scope.clearTasks = function () {
+                $scope.currentTasks = [];
+            }
 
             $scope.newTask = function () {
                 $uibModal.open({
@@ -131,7 +141,7 @@ define(['angular', 'uiBootstrap', 'uiRouter'], function (angular) {
                     }
                     tasks.push(submitTask)
                 }
-                $http.post('/sys/settle_tasks', tasks).then(function () {
+                $http.post('/sys/settle_tasks', tasks).then(function (resp) {
                     commonDialog.alert({type: 'success', title: 'Success', content: resp.data.message})
                     ctrl.update_task = $interval(function () {
                         $scope.checkProgressStatus()
diff --git a/src/main/ui/static/analysis/templates/settle_tasks_index.html b/src/main/ui/static/analysis/templates/settle_tasks_index.html
index 5cb6f4883..7973ea9c8 100644
--- a/src/main/ui/static/analysis/templates/settle_tasks_index.html
+++ b/src/main/ui/static/analysis/templates/settle_tasks_index.html
@@ -29,8 +29,15 @@
         <div class="box box-info">
             <div class="box-header">
                 Tasks Prepare
-                <button class="btn btn-success pull-right" ng-click="newTask()">New Task</button>
-                <button class="btn btn-warning pull-right" ng-click="submitTasks()">Execute Tasks</button>
+                <button class="btn btn-success pull-right" ng-disabled="progress.processing" ng-click="newTask()">New
+                    Task
+                </button>
+                <button class="btn btn-warning pull-right" ng-disabled="progress.processing" ng-click="submitTasks()">
+                    Execute Tasks
+                </button>
+                <button class="btn btn-warning pull-right" ng-disabled="progress.processing" ng-click="clearTasks()">
+                    Clear Tasks
+                </button>
             </div>
 
             <div class="box-body">