Abstract: Neither space object nor space debris has clear definition in international law and the jurisdiction on space debris is in question as well. Therefore, there is hardly a consensus about the legal basis on the active debris removal(ADR)in the international community. Nevertheless, the legitimacy of active removal of native space debris could also be found in the series of UN space conventions, such as the jurisdiction of Registry State,Owner State and Launching States. On the other hand, there are also arguments cited from the principles, regulations and cases in international law as defenses to a wrongful act, active removal of other States'space debris, such as "agreements" , "necessity" , "removal of the ship wreckage". China should work on the ADR technics, negotiation strategy, native law and policy on base of a full consideration on the legal analysis of ADR.