Fuel-starvation protection device for air compressor

A fuel-starvation protection device for an air compressor relates to the fuel-starvation protection of a lubricating system of the air compressor; the fuel-starvation protection device for the air compressor is designed by adopting the principles of machinery, electric appliances and magnetic field. The fuel-starvation protection device for the air compressor comprises a crankshaft box body, a floating ball, a fuel-starvation protector, a magnet minitype contact switch, a floating ball connecting seat, a motor of the air compressor, a power line, a magnetic pipe, an oil storage chamber and an oil pointer; the rectangular oil pointer is arranged on the crankshaft box body; the fuel-starvation protector is arranged at the right end of the crankshaft box body close to the central position; the floating ball connecting seat is connected with an iron plate on the crankshaft box body; the magnet minitype contact switch is arranged at the cylindrical center position of the left end; and the power line is connected w