我知道这是个老问题。但我希望有人能发现它有用。如果出于某种原因，你不能使用儿童主题（像我一样），那么就有钩子theme_page_templates 符合developer WP Page Templates.示例：

function makewp_exclude_page_templates( $post_templates ) {
  if ( is_multisite() && !is_main_site() ) {
    unset( $post_templates[\'wp-templates/iframe_container.php\'] );
    //In my case this one is removed from the list on every page other than main site
  } 
  return $post_templates;
}
add_filter( \'theme_page_templates\', \'makewp_exclude_page_templates\' );