The utility model discloses a pumped storage unit shaft seal wearing and tearing real -time supervision device, an equipment that be used for the water -storage power station is related to, the signal of shaft seal ring on measuring target plate is detected through the eddy current sensor on hydraulic turbine upper cover plate, arrive signal conversion and analysor again through preamplifier, output 0 - -12mm wearing and tearing volume and the 0 - -0.16mm volume of lifting up signal show to hydraulic turbine monitor control device, the signal input water film thickness gauge of the measurement target plate that preamplifier received, the static thickness and the dynamic thickness of output water film, show on hydraulic turbine monitor control device, the realization is to the real -time supervision of the shaft seal wearing and tearing volume and the water film thickness of lubricated water, moreover, the steam generator is simple in structure, the monitoring data is accurate, system security nature has been guaranteed.