您需要替换默认值rel_canonical 执行此操作的函数：

function wpse_84647_rel_canonical() {

    /* Only affect singular posts. Exit early if Yoast SEO is doing this for us */
    if ( ! is_singular() || class_exists( \'WPSEO_Frontend\' ) )
        return;

    /* Get the post permalink */
    $post = get_queried_object();
    $link = trailingslashit( get_permalink( $post->ID ) );

    /* Get the number of pages the post is split into */
    $numpages = substr_count( $post->post_content, \'<!--nextpage-->\' ) + 1;

    /* Get the current pagination page number */
    $page = ( get_query_var( \'page\' ) ? get_query_var( \'page\' ) : 1 );

    /* Add the page number if the post is paginated */
    if ( $numpages && $page > 1 )
        $canonical = user_trailingslashit( $link . $page );
    else
        $canonical = get_permalink( $post->ID );

    /* Output the canonical link */
    printf ( "\\n" . \'<link rel="canonical" href="%s" />\', $canonical );

    /* Add the adjacent rel links */
    if ( $page > 1 ) {
        remove_action( \'wp_head\', \'adjacent_posts_rel_link_wp_head\', 10, 0 );
        /* Link to the previous adjacent post */
        $prev = $page - 1;
        if ( $prev > 1 )
            printf ( "\\n" . \'<link rel="prev" href="%s" />\', user_trailingslashit( $link . $prev ) );
        else
            printf ( "\\n" . \'<link rel="prev" href="%s" />\', get_permalink( $post->ID ) );
    }
    if ( $page < $numpages ) {
        remove_action( \'wp_head\', \'adjacent_posts_rel_link_wp_head\', 10, 0 );
        /* Link to the next adjacent post */
        $next = $page + 1;
        printf ( "\\n" . \'<link rel="next" href="%s" />\', user_trailingslashit( $link . $next ) );
    }
    print "\\n";
}

remove_action( \'wp_head\', \'rel_canonical\' );
add_action( \'wp_head\', \'wpse_84647_rel_canonical\', 9 );

此外，如果您使用Yoast的WordPress SEO插件，您将不需要此代码段，因为该插件为您处理规范链接。