钩入wp_insert_post, 检查是否是页面的自动草稿，并设置comment_status 到closed:

add_action( \'wp_insert_post\', \'t5_disable_default_comments_on_pages\', 10, 2 );

function t5_disable_default_comments_on_pages( $post_ID, $post )
{
    remove_filter( current_filter(), __FUNCTION__ );

    if ( \'auto-draft\' !== $post->post_status or \'page\' !== $post->post_type )
        return;

    $post->comment_status = \'closed\';

    wp_update_post( $post );
}