The micro EDM of Suntech can process Φ0.03mm - Φ0.15mm micro hole which can be extended to Φ1mm according to customer needs. It also can be used to process four edge inverted cone micro holes and a variety of special-shaped holes. The CNC system automatically controls each CNC shaft to realize the complex precision positioning. According to the discharge state detection and identification and intelligent control strategy, the micro EDM can realize the machining of various kinds of precision micro-holes such as the nozzle injection micro-hole seat on various engines. It has the characteristics of high machining efficiency, high machining precision, good surface quality, good aperture consistency, easy operation, no environmental pollution and so on.