The discharge machining machine tools are equipped with 3D, CAD/CAM systems, and Swiss EROwA fixture systems, which enable efficient and fast electrode replacement, greatly improving the advantages of discharge machining, and fully utilizing the machine performance to achieve the highest dimensional accuracy of discharge machining of ± 0.001mm, with a Ra value of 0.12 for smoothness (ultra precision surface) μm. Clear angle R<0.015mm, even smaller clear angle R<0.01mm is handy. This technology Iprovides an excellnt technical solution for the development of molds for manufacturing electronic connectors such as BTB, FPC, and MICROSD cards.