A laser cutting apparatus for the short-circuit ring of liquid crystal screen is composed of leveling mechanism, castors, upper and lower machine frame modules, master driver, cleaning power supply, moving control system, man-machine interaction device, Y-axis bench, X-axis bench, theta-axis turntable, basic plate carrier, laser cutting system, the first and the second align systems, display screen of control computer, dusting unit, switch, image monitor, image monitor system, antistatic device, blower, frame module, bench, power supply system, and pneumatic system.