Abstract: With electricity marketization for over 20years,United Kingdom（UK）has established a relatively complete electricity market system.However,owing to global climate change and environmental factors,the UK third electricity market reform attempts to ensure that the future electricity supply is secure,low-carbon while affordable.According to documents released by the UK government in recent years,this paper summarizes and gives an account of the main contents of the UK electricity market reform,including feed-in tariff with contracts for difference in price,emissions performance standards,capacity market and carbon price floor,regulatory asset base and others,and a brief discussion of the expected results.Finally,the enlightenment significance to Chinas power market construction is described.