Micro electrochemical jet machining (EJM) possesses some unique advantages,such as high efficien
cy and good machining surface quality. For improving the efficiency and machining quality,a special jet device was designed and manufactured,and preliminary processing experiments were performed with the device. The results show that electrolyte can be sufficiently “cathodic polarized in the cavity of the device and the stable breakup length of electrolyte stream is long enough to machine,so the device meets the requirements for processing experiments.