A new polishing head is studied in magnetic-electrochemical compound polishing in the paper. Added a magnetic field whose direction is parrallel to the electrical field’s directions, the charged partcles between two electrodes can move in spirals in magnetic-electrochemical compound polishing, and then the condition of chemical reaction is improved. If the direction of magnetic field is changed alternative, the effect of polishing can be improved more clearly. The tool can be fixed on spindle of CNC easily. The tool is flexible, so it can make the polishing head and workpiece touch evenly each other. Because the head of magnetic-electrochemical compoud polishing tool is a series, the head can be replaced conveniently according to different surface. Particularly,the tool can change strength of the magnetic field easily. At last, the tool is tested and its function is perfect.