The utility model discloses a steel cutting machine, including the cutting machine body, one side of cutting machine body is provided with the motor, pivot on the motor is passed through the belt and is connected with the pivot transmission on the cutting piece, the top of cutting machine body is provided with the handle, the bottom of cutting machine body articulates through the pivot has the fixing base, the first base of bottom fixedly connected with of fixing base, the upper surface of first base is provided with fixing device, and fixing device is located the cutting piece under, the bottom of first base is provided with the gyro wheel that a plurality of equidistance were arranged, the bottom of gyro wheel is provided with the second base, first base and second base pass through rope gear fixed connection. This steel cutting machine the time fixes in the cutting very easily, waits to cut the stable good of object, and cut error is little, is provided with the gyro wheel between first base and second base, and through removing first base, can be nimble cut the large -scale steel that can't remove is cut efficiently.