Abstract: The high power space electric propulsion with thrust larger than 1 N,specific impulse larger than thou-sands seconds and life span tens of thousands of hours is needed for the future space missions such as deep space explora-tion and space freight etc.In this work,the high power space electric propulsion technologies at home and abroad are intro-duced,and the prospects of every technology are discussed.Moreover,the key common technologies of high power sup-ply,magnetic field topology optimization,thermal protection and test are also extracted from the perspective of the space application.And which will be benefit for the development of high power electric propulsion.