按照如下所示，按照@gyo的建议和@Howdy\\u McGee在他的answer.

function admin_queue( $hook ) {
    global $post; 
    if ( $hook == \'post-new.php\' || $hook == \'post.php\' ) {
        if ( \'targeted-posttype\' === $post->post_type ) { 
            wp_enqueue_script( 
                \'custom-title-here\', 
                bloginfo( \'template_directory\' ) . \'/scripts/custom-script.js\', 
                \'jquery\', 
                \'\', 
                true 
            );
        }
    }
}
add_action( \'admin_enqueue_scripts\', \'admin_queue\' );