Simple steel plate cut-off machine convenient to operate and using method thereof

The simple steel plate cut-off machine convenient to operate comprises a machine base, a machine frame and a machine case, the machine frame is fixedly arranged at the rear end of the machine base, the machine case is fixedly arranged at the upper end of the machine frame, and a speed adjusting knob, a power switch and a starting switch are fixedly installed on the side face of the machine frame; an access door is fixedly installed at the front end of the machine box, a roller is movably installed at the upper end of the machine base, a belt is movably installed outside the roller, a tool rest is fixedly arranged at the right end of the machine base, a fixed tool apron is fixedly installed at the upper end of the tool rest, a fixed tool bit is fixedly installed in the fixed tool apron in a nested mode, and a wheel carrier is fixedly installed at the lower end of the machine box. During use, a power switch is started firstly, a steel plate is placed on a belt, a fixing rotary knob is loosened, the height of th