您需要使用date 查询：

$args = array (
   \'cat\' => \'1234\', // if category being used
   \'post_type\' => \'events\', // if custom post type
   \'paged\' => get_query_var(\'paged\'),
   \'order\' => \'DESC\',
   \'paged\' => $paged,
   \'date_query\' => array( // this is the thing you need
     array(
       \'before\'    => array( // this is \'before today\'...
         \'year\'  => date(\'Y\'),
         \'month\' => date(\'m\'),
         \'day\'   => date(\'d\')
        ),
       \'inclusive\' => true,
     ),
    ),

    );
   $past_events = new WP_Query($args);