A new method of Electrical Discharge Machining(EDM) for small-holes was presented, in which the critical value of machining could be less than that generated by a primitive EDM system. The characters of small-hole EDM in an area equalization by the current dividing were studied,and the effects of the current dividing on the drilling speed,electrode wear and the discharge gap were researched. Research results provide a deeper understanding for the small-hole EDM in area equalization by the current dividing. Experiments to verify the stability and feasibility of the EDM in area equalization by the current dividing were carried out and experimental results show that the drilling speed and discharge gap decrease a little and the electrode wear increases slightly. Moreover, there is a consistency in process effect between single and double electrodes, which is conductive to the control of a dimension precision. Finally,a 0.6 mm×0.6 mm square is obtained through the current dividing using the process parameters of 1 mm×1 mm in the signal electrode EDM, which proves that the method in EDM by the current dividing is effective for the small-hole machining.