Space debris mitigation has become an international custom for international space activities. IADC and COPUOS adopted a Guideline on Space Debris Mitigation. Two Guidelines provided that member states or international organization shall establish a national mechanism to mitigate space debris. China has made progress in legislation on space debris mitigation and management system. It establised a fundamental framework on the legislative mechanism on space debris mitigation and managemental mechanism on space debris mitigation. In order to further improve the national mechanism on space debris mitigation, it is essential for China to strenghen legislation on space activities and specify the duties of management administrates.