在functions.php添加： 

function example_remove_dashboard_widgets() {
    global $wp_meta_boxes;
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_recent_drafts']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);
}
add_action('wp_dashboard_setup', 'example_remove_dashboard_widgets' );
remove_action('welcome_panel', 'wp_welcome_panel');