Abstract:The influence of the second time cutting parameters of MS-WEDM multiple cutting on surface quality and cutting speed was studied to find the optimal combination of parameters,which was conducive to improve the quality of multiple cutting. A single factor experiment was used to study the influences of the second cutting parameters on the surface roughness and cutting speed, such as pulse width, interpulse, power amplifier, and wire speed.Four levels and four factors were selected for orthogonal test. Multiobjective optimization problem of the surface roughness and the cutting speed was transformed into single objective problem of the weighted comprehensive score by comprehensive evaluation method. The results show that the optimal machining parameters are 6 μs pulse width, 5 μs interpulse, 1 power amplifier, 6 m/s wire speed, and through the test verification, the surface roughness is 1.54 μm, cutting speed is 149.43 mm2/min, the weighted comprehensive score is 0.26.