How to integrate content type to webform Drupal 7?
Tvphong, I think that the best way to go about doing this is by using a custom module so that you can then integrate that content type within the select list of preloaded options.

Perhaps this link can serve you well in this.

What I ended up doing is a slight tweak of this. So my custom module looks something like this (which is for location content types):

&lt;?php 

/**
 * Reference:  http://eureka.ykyuen.info/2012/04/11/drupal-7-dynamic-select-options-for-webform/
 * The following piece of code is based on the blog post above
 */
function webform_options_webform_select_options_info() {
 $items = array();

 if (function_exists('get_location_titles')) {
  $items['location_titles'] = array(
    'title' =&gt; t('Location titles'),
    'options callback' =&gt; '_get_location_titles',
    );
 }

 return $items;
}

function _get_location_titles() {
 $options = array();
 $type = "location";

 $result = db_query('SELECT nid, title FROM {node} n WHERE n.type = :tname', array(':tname' =&gt; $type));
 foreach ($result as $row) {
  $options[$row-&gt;nid] = $row-&gt;title;
 }
 return $options;
}