您可能会尝试一些东西，我在几年前发现了这个解决方案，它工作得很好-它不仅允许覆盖字数限制，还允许一些基本样式，以便如果您的摘录包含粗体字，那么这些字将显示在摘录中。

// Improves the look of the excerpt, more words, allows bolding

function improved_trim_excerpt($text) {
$raw_excerpt = $text;

$excerpt_more = \'&hellip;<a class="more-link" href="\'. esc_url( get_permalink() ) . \'" title="\' . esc_html__( \'Continue reading\', \'wp-answers\' ) . \' &lsquo;\' . get_the_title() . \'&rsquo;">\' . wp_kses( __( \'Continue reading <span class="meta-nav">&rarr;</span>\', \'wp-answers\' ), array( \'span\' => array( 
        \'class\' => array() ) ) ) . \'</a>\';    

if ( \'\' == $text ) {
    $text = get_the_content(\'\');
    $text = strip_shortcodes( $text );
    $text = apply_filters(\'the_content\', $text);
    $text = str_replace(\'\\]\\]\\>\', \']]&gt;\', $text);
    $text = strip_tags($text, \'<b><strong><del><em>\');
    $excerpt_length = apply_filters(\'excerpt_length\', 55);//change 55 to whatever word limit you want
    $newexcerpt_more = apply_filters(\'excerpt_more\', \' \' . $excerpt_more);
    $words = preg_split("/[\\n\\r\\t ]+/", $text, $excerpt_length + 1, PREG_SPLIT_NO_EMPTY);
    if ( count($words) > $excerpt_length ) {
        array_pop($words);
        $text = implode(\' \', $words);
        $text = $text . $newexcerpt_more;
        $text = force_balance_tags( $text );
    } else {
        $text = implode(\' \', $words);
        $text = force_balance_tags( $text );
    }
}
return $text;
}
remove_filter(\'get_the_excerpt\', \'wp_trim_excerpt\');
add_filter(\'get_the_excerpt\', \'improved_trim_excerpt\');