diff --git a/misc/acrn-config/config_app/controller.py b/misc/acrn-config/config_app/controller.py
index b49ba97c5..2d482b3f2 100644
--- a/misc/acrn-config/config_app/controller.py
+++ b/misc/acrn-config/config_app/controller.py
@@ -163,11 +163,17 @@ class XmlConfig:
         tag = args[-1]
         args = args[:-1]
         dest_node = self._get_dest_node(*args)
+        new_node_desc = None
         for node in dest_node.getchildren():
-            dest_node.remove(node)
+            if node.tag == tag:
+                if 'desc' in node.attrib:
+                    new_node_desc = node.attrib['desc']
+                dest_node.remove(node)
         for value in values:
             new_node = ElementTree.SubElement(dest_node, tag)
             new_node.text = value
+            if new_node_desc is not None:
+                new_node.attrib['desc'] = new_node_desc
 
     def set_curr_attr(self, attr_name, attr_value, *args):
         """
diff --git a/misc/acrn-config/config_app/static/main.js b/misc/acrn-config/config_app/static/main.js
index f5b89623d..63ee85031 100644
--- a/misc/acrn-config/config_app/static/main.js
+++ b/misc/acrn-config/config_app/static/main.js
@@ -510,7 +510,14 @@ function save_launch(generator=null) {
     $("input").each(function(){
         var id = $(this).attr('id');
     	var value = $(this).val();
-    	if(id!='new_launch_name' && id!='board_info_file'
+
+        if(id.indexOf('virtio_devices,network')>=0 || id.indexOf('virtio_devices,block')>=0) {
+            if(id in launch_config) {
+                launch_config[id].push(value);
+            } else {
+                launch_config[id] = [value];
+            }
+        } else if(id!='new_launch_name' && id!='board_info_file'
     	    && id!='board_info_upload' && id!='scenario_name'
     	    && id!="launch_file") {
             launch_config[id] = value;
diff --git a/misc/acrn-config/config_app/templates/launch.html b/misc/acrn-config/config_app/templates/launch.html
index 93618983b..18ff2146a 100644
--- a/misc/acrn-config/config_app/templates/launch.html
+++ b/misc/acrn-config/config_app/templates/launch.html
@@ -157,6 +157,7 @@
                 {% elif elem.getchildren() != [] %}
                     {% if 'multiselect' not in elem.attrib or elem.attrib['multiselect'] != 'true' %}
                     {% set first_child = [] %}
+                    {% set first_multi_child = {'block': 0, 'network': 0} %}
                         {% for sub_elem in elem.getchildren() %}
                             {% set sub_elem_text = '' if sub_elem.text == None else sub_elem.text %}
                             {% if 'configurable' not in sub_elem.attrib or sub_elem.attrib['configurable'] != '0' %}
@@ -178,7 +179,7 @@
                                         {{sub_elem.tag}}</label>
 
                                     {% if ','.join(['uos', elem.tag, sub_elem.tag]) not in launch_item_values %}
-                                    <div class="col-sm-6">
+                                    <div class="col-sm-5">
                                         {% if 'readonly' in sub_elem.attrib and sub_elem.attrib['readonly'] == 'true' %}
                                         <input type="text" class="form-control" readonly
                                                id="{{'uos:id='+vm.attrib['id']+','+elem.tag+','+sub_elem.tag}}"
@@ -189,6 +190,19 @@
                                                value="{{sub_elem_text}}">
                                         {% endif %}
                                     </div>
+
+                                    {% if elem.tag in ['virtio_devices'] and sub_elem.tag in ['block', 'network'] %}
+                                        <div class="col-sm-1">
+                                            <button type="button" class="btn" id="add_virtio_{{sub_elem.tag}}_{{first_multi_child[sub_elem.tag]}}">+</button>
+                                            {% if first_multi_child[sub_elem.tag] == 0 %}
+                                            <button type="button" disabled class="btn" id="remove_virtio_{{sub_elem.tag}}_{{first_multi_child[sub_elem.tag]}}">-</button>
+                                            {% else %}
+                                            <button type="button" class="btn" id="remove_virtio_{{sub_elem.tag}}_{{first_multi_child[sub_elem.tag]}}">-</button>
+                                            {% endif %}
+                                        </div>
+                                        {% do first_multi_child.update({sub_elem.tag: first_multi_child[sub_elem.tag]+1}) %}
+                                    {% endif%}
+
                                     {% else %}
                                     <div class="dropdown col-sm-6">
                                         {% if 'readonly' in sub_elem.attrib and sub_elem.attrib['readonly'] == 'true' %}