Abstract: The nationality link aims at the state's responsibility in space activities. It is the guidance to define responsibility. Therefore the related nation shall raise the consciousness relevant to its own responsibility, perform authorization and reduce the risks in order to avoid damage. However under the privatization and commercialization of space activities, it is necessary to lower the risk level of nationality state, which will release the limitation to private space activities correspondingly. Meanwhile it will enhance the sense of responsibility of private subjects. To loosen the link of nationality is the trend of development of space liability regime. On the contrary from private international law's perspective the connect points such as “nationality” shall be emphasized to solve the international civil and commercial disputes occur in space activities.