Electrical spark piercing machine is mainly used for processing stainless steel, hardened steel, carbide, copper, aluminum and other conductive materials on the workpiece deep small holes. EDM perforating machine also known as EDM perforating machine, EDM small hole machine, EDM fine hole discharge machine, its working principle is the use of continuous up and down vertical movement movement of fine metal copper tube (known as the electrode wire) as the electrode, the workpiece for the impulse spark discharge etching metal molding. With EDM wire cutting machine tools, molding machine is different, it is the electrode of the electric pulse is a hollow copper rod, the medium from the copper rod hole in the middle of the hole through the fine holes, play a role in cooling and chip removal. The discharge between the electrode and the metal produces high temperature corrosion of the metal to achieve the purpose of perforation, for the processing of super-hard steel, cemented carbide, copper, aluminum and any conductive material fine holes. Minimum can be processed 0.015mm hole, can also be processed with a taper hole, is widely used in precision mold processing, is generally used as a supporting equipment for EDM wire cutting machine tools, used for EDM wire cutting processing of threading holes, chemical fiber spinnerets, spinneret spinneret holes, filter panels, filter panels, screen plate group of holes, engine blades, cylinder block of the heat dissipation holes, hydraulic, pneumatic valves, such as oil, gas line holes.