In order to further improve the gap discharge condition of short electrical arc milling machining(SEMA),the internal and external flushing combined type was used to simulate and analyze the pressure,velocity and particle removal law of flow field.The influence of different flushing modes,flushing pressure and electrode speed on the flow field characteristics of the interelectrode gap was analyzed,and a single factor test was carried out.The MRR and TWR were used as evaluation indexes to find the best parameters in SEMA.