The invention discloses an improved wrench polishing machine, which comprises a wrench fixing device, a polishing device, a frame body and a moving seat mechanism. The frame body is provided with a moving seat mechanism and a polishing device located in front of the moving seat mechanism. The seat mechanism is provided with a wrench fixing device, and the wrench fixing device includes a lifting mechanism, an adjustable fixing mechanism for fixing the wrench head and a fixing device for fixing the free end of the wrench handle, and the moving seat mechanism is provided with a lifting mechanism and a fixing device, The lifting mechanism is provided with an adjustable fixing mechanism, and the adjustable fixing mechanism includes a shelving seat, two sliding rods, an adjusting screw, an adjusting plate, two pillars, a connecting body, two sliding bodies, a pressing body, two Compared with the prior art, a spring, two blocking bodies, a screw body, two supporting bodies, a mounting base and a rotating disc can be applied to wrenches of various sizes, thereby improving work efficiency and polishing uniformity.