// 禁用自动生成的图片尺寸
function shapeSpace_disable_image_sizes($sizes) {
unset($sizes['thumbnail']);    // disable thumbnail size
unset($sizes['medium']);       // disable medium size
unset($sizes['large']);        // disable large size
unset($sizes['medium_large']); // disable medium-large size
unset($sizes['1536x1536']);    // disable 2x medium-large size
unset($sizes['2048x2048']);    // disable 2x large size
return $sizes;
}
add_action('intermediate_image_sizes_advanced', 'shapeSpace_disable_image_sizes');
// 禁用缩放尺寸
add_filter('big_image_size_threshold', '__return_false');
// 禁用其他图片尺寸
function shapeSpace_disable_other_image_sizes() {
remove_image_size('post-thumbnail'); // disable images added via set_post_thumbnail_size() 
remove_image_size('another-size');   // disable any other added image sizes
}
add_action('init', 'shapeSpace_disable_other_image_sizes');

将上方的代码添加至您的WordPress当前使用主题文件夹下的 functions.php 文件即可
以当前网站根目录为例，主题函数文件路径一般为：WordPress网站根目录/wp-content/themes/主题文件夹/functions.php 添加至<?php 后面即可