Abstract: The implementation of national laws in the special administrative region is the most intuitive embodiment of the organic combination of the comprehensive governance power of the central government and the high degree of autonomy of the special administrative region at the legal level. Since the establishment of the Special Administrative Region, national laws have played an important role in the relevant legal system of the Special Administrative Region. However, there are still some problems in its implementation, such as effectiveness, landing and supervision. After the enactment and implementation of the Law of the People's Republic of China (PRC) Special Administrative Region on Safeguarding National Security, it has opened up a new path for the implementation of existing national laws, but because of its particularity, it has not institutionalized the implementation of existing national laws. Based on the revision of Annexes I and II of the Basic Law of the People's Republic of China (PRC) Special Administrative Region, this study holds that clauses should be added to Annex III of the Basic Law of the People's Republic of China (PRC) Special Administrative Region to improve the implementation of national laws in the Special Administrative Region.