WEDM is a kind of technology to realize the size of workpiece machining. Under certain conditions, a reasonable processing craft route formulation is an important link to ensure the quality of workpieces. The electrical spark linear cutting machine tools or parts, generally can be divided into the following steps. On pattern analysis and review the drawings to ensure the comprehensive technical index of the processing quality of the workpiece and the workpiece is the first step of decisive significance. 1, to analyze and review the design drawings to ensure the comprehensive technical index of the processing quality of the workpiece and the workpiece is the first step of decisive significance. To die as an example, in the digestion pattern must first pick out not easy job pattern WEDM, roughly as follows: the surface roughness and precision demand is very high, cutting can not be manually grinding; the narrow gap smaller than the workpiece electrode wire diameter and discharge gap, the workpiece or graphics inside corner is not allowed to form the electrode with a rigid derrick discharge gap fillet; the non-conductive material; the thickness exceeds the wire frame span parts; the processing length of more than x, the effective stroke length y carriage, workpiece and high accuracy requirements. In line with the line cutting processing conditions, should be considered carefully in terms of surface roughness, dimensional accuracy, the thickness of the workpiece, the workpiece material, size, with the gap and the workpiece thickness.