Honeycomb sealing structure is an advanced and efficient sealing structure for contemporary aero-engine,and traditional machining is difficult to meet the machining quality requirements,so short electric arc machining (SEAM) technology is needed to process such parts.In order to obtain the optimal machining parameters,the recast layer thickness and micro morphology were taken as the indexes,the current and voltage waveforms,surface energy spectra,surface and cross-section morphology of the workpiece were analyzed,and response surface analysis was performed.The results show that the significance of the influence on the thickness of recast layer and machining time is feed rate＞workpiece speed＞electrode speed,the thickness of recast layer increases with the increase of feed rate and decreases with the increase of workpiece and electrode speed,and the surface quality has the same trend.The best parameters obtained by multi-objective optimization are: workpiece speed is 5.863 r/min, electrode speed is 287.114 r/min and feed rate is 0.087 mm/min. Therefore,appropriately reducing the feed rate and increasing the workpiece and electrode speed can reduce the phenomena of microcracks,erosion pits and molten droplet particles,improve the surface quality of the workpiece and reduce the thickness of the recast layer.