我解决了这个问题，这个问题是我以前用过但忘记了的函数！

 add_filter( \'post_thumbnail_html\', \'remove_thumbnail_dimensions\', 10 );
 add_filter( \'image_send_to_editor\', \'remove_thumbnail_dimensions\', 10 );
 function remove_thumbnail_dimensions( $html ) {
     $html = preg_replace( \'/(width|height)=\\"\\d*\\"\\s/\', "", $html );
     return $html;
 }