Abstract: In order to solve the phenomenon of "secondary discharge" or even short circuit caused by the accumulation of melt between electrodes in short arc milling (SEAM) and improve machining efficiency and surface quality, the effects of non-electric parameters including flushing pressure, tool electrode rotation speed and feed rate on material removal rate (MRR), tool electrode wear ratio (TWR) and surface morphology of TC4 in short arc milling were studied in this paper. The experimental results show that the non-electric parameters have significantly effects on the material removal rate (MRR) and tool electrode wear ratio (TWR). The effect of feed rate on tool electrode loss has a negative growth of -4% and -71%. The electrochemical reaction occurs between the electrodes, and the resulting oxide film has a certain compensation for the electrode loss. By appropriately increasing the flushing pressure, the tool electrode rotation speed and the feed rate, it is possible to effectively avoid short-circuit phenomena and reduce the number of microcracks and erosion holes on the workpiece surface, and which is conducive to improve the surface integrity of the workpiece.