Abstract: The international space law refers to a bunch of rules which involve the rights and obligations in the exploration, the use and the exploitation of the outer space among various countries and international organizations. In a narrow sense, it refers to the international treaty system, i.e., the five UN space treaties. In general, it also includes the UNGA regulations, which are not legally binding but have a strong political binding effect. China ratified the Outer Space Treaty in 1984, and the Rescue Agreement, the Liability Convention, and the Registration Convention in 1988, but did not ratify the Moon Agreement. This paper briefly analyses the possible effects and restrictions brought by the regulations in the four space treaties and other non-legally binding documents, including the Remote Sensing Principle, the Draft of Prevention of Weapon Placement, the UNGA regulation of Transparency and Confidence-building Measures in Outer Space(TCBMs), and the draft Long-Term Sustainability(LTS) of the outer space activity guidelines, with corresponding recommendations or countermeasures presented.