The market power issue has become a research focus in the process of China's electricity market reform and construction, but the existing domestic research control methods are detached from China's electricity legal system, and the compliance of market power control tools is doubtful. In this regard, based on the experience of the U.S. power market control and the regulations of the Anti-monopoly Law of the People's Republic of China, the design of the ‘relevant market definition-market dominance identification-abuse of market dominance’ is built within the legal framework, and the market power regulatory mechanism for medium and long-term market and spot market is proposed. Some short-term and long-term suggestions on the market power issues are put forward to help the future development of China's electricity market.