在您的register_post_type 调用，确保您有以下参数：

register_post_type(
    \'my_post_type\',
    array(
        \'hierarchical\' => true,
        \'public\' => true,
        \'rewrite\' => array(
            \'slug\'       => \'my_post_type\',
            \'with_front\' => false,
        ),
        \'supports\' => array(
            \'page-attributes\' /* This will show the post parent field */,
            \'title\',
            \'editor\',
            \'something-else\',
        ),
        // Other arguments
    )
);

现在，当您创建新my_post_type, 只需将其父级设置为另一个，它的永久链接将如下所示：

http://example.com/parent-post-type/my-post-type/