Aiming at the size and shape accuracy of edges of superalloy complex curved blades, an experimental study on precision electrolytic machining (PECM) was conducted. The results show that the use of vibration feed ECM machine tools and optimization of cathode design methods can improve the size of the leading and trailing edges accuracy by PECM processing. Using conductivity of 85- 90mS/cm and 25℃ electrolyte of NaNO3, amplitude of 0.4mm and vibration frequency of 40Hz process the shape of leading edges of the center profile meet the design requirements, and trailing edges is close to the design requirements. On this basis, as a supplementary means of PECM, exploring to solve the problems of the shape control of blade edges by combining with vibration lighting process.