The invention discloses a strip steel polishing machine with cutting and unloading functions. The machine comprises a machine body; a base is arranged at the lower end of the machine body; a guide groove is formed in the upper end of the base; a conveying belt is arranged in the guide groove; one end of the conveying belt is a discharge port; a cutting frame is arranged at the back end of the discharge port; a slide rail is arranged at the upper end of the cutting frame; a lifting bracket is slidingly arranged at the lower end of the slide rail; a steel saw blade is arranged in the lifting bracket; a support plate is arranged at the lower end of the cutting frame; and the support plate is arranged by supporting on the outer side of the discharge port of the conveying belt; two extension rods are arranged on the two sides of the upper end of the base; a rail beam is connected between the upper ends of the two extension rods; a polisher is slidingly arranged at the lower end of the railbeam; a collecting box is arranged at the back end of the base; a water storage tank is arranged at the side end of the base; and the water storage tank leads a drainage pipe into the collecting box.Through the mode, the machine can cut polished strip steel for subsequent use.