The utility model relates to a cutting device of railway steel rails, which is mainly composed of a longitudinal machine frame, road wheels, a left and a right operating levers, an electric motor, a belt, a grinding wheel and a jig. The utility model is characterized in that a rapid chucking appliance is arranged on the device, and the rapid chucking appliance and the steel rail are firmly clamped together; belt gearing is arranged between the rotating grinding wheel and the electric motor; the left and the right operating levers are respectively designed into a bending shape and a folding shape; land road wheels (two universal wheels and two road wheels) and a steel rail road wheel are also arranged; the utility model is also provided with a cart type hand grip. When the complete device transfers work places and the upper and the lower tracks, and when users push the device and walk on the track, the utility model has the advantages of convenient operation, labor saving, compact structure of the complete device and beautiful and generous appearance of the complete device.