DFM-2.2 type electric profiling grinding machine, which is suitable for various types of rail top, side and corner of the rail grinding machinery, can be used to switch and the rail surface profiling grinding has the advantages of compact structure, convenient operation, low failure rate. Mainly used for the welding of rails and the rail damage repair, small equipment for rail profiling grinding. The machine is suitable for all types of 43~75kg/m rail.