您可以使用taxquery, 并循环遍历结果，逐个删除它们。

wp_delete_post() 您可以选择将帖子移动到垃圾箱，或强制删除它，所以请小心。

为了确保删除正确的帖子，您可以创建要删除的帖子列表，而不是直接删除它们。

瞧，代码来了：

function f711_delete_all_posts_from_taxonomy() {

    $args = array(
        \'orderby\'         => \'post_date\',
        \'order\'           => \'DESC\',
        \'numberposts\'     => -1,
        \'post_type\'       => \'post\', // or whatever posttype you want to delete
        \'tax_query\' => array(
            array(
                \'taxonomy\' => \'yourtaxonomy\',
                \'field\' => \'slug\',
                \'terms\' => \'slug-to-be-deleted\'
            )
        )
    );
    $posts = get_posts( $args );
    foreach( $posts as $thispost ) {

        wp_delete_post( $thispost->ID, true ); //set second parameter to false to move the post to the trash

    }

}