我想你应该用single_template 筛选钩子以从子目录加载模板。完整代码如下所示-

function the_dramatist_get_custom_post_type_template($single_template) {
    global $post;

    if ($post->post_type == \'your_post_type\') {
        // Your post type directory with the post type template file name
        $single_template = dirname( __FILE__ ) . \'/post-type-template.php\';
    }
    return $single_template;
}
add_filter( \'single_template\', \'the_dramatist_get_custom_post_type_template\' );