尝试以下方法。

使用获取页面get_page_by_path()

http://codex.wordpress.org/Function_Reference/get_page_by_path

$page = get_page_by_path( \'university-guide\' );

$search_query[\'post_type\'] = \'page\';
$search_query[\'post_parent\'] = $page->ID;

global $query_string;

$query_args = explode("&", $query_string);
$search_query = array();

foreach($query_args as $key => $string) {
    $query_split = explode("=", $string);
    $search_query[$query_split[0]] = urldecode($query_split[1]);
} // foreach

$search = new WP_Query($search_query);

您可以使用WP\\u Query codex页面了解有关可用选项的更多信息。https://codex.wordpress.org/Class_Reference/WP_Query