This paper deals with a new finishing technique called pulse electrochemical finishing technology (PECF) and its application to column surface of carbon steel. PECF makes use of pulse current and neutral electrolyte. There is nearly no wear of the cathode, and nearly no cutting force or cutting heat, which may result in the deformation of wokpiece. The principle of the technique is put forward, and the equipment as well as a typical finished sample is shown in this paper. The key technological parameters of PECF are studied and the favorable values are presented. With the moving cathode PECF technology, the roughness value of ground surface could be reduced from Ra 0.217～1.13μm to Ra 0.041μm. Combined with NC technology, PECF could be applied to the finishing field widely.