Abstract: The effect of white light transmittance of ZF6 lead glass for nuclear power plants is studied experimently. The main factors causing the white light transmittance change is analyzed. Meanwhile, the changing law of the transmittance of lead glass with different thickness under different doses of irradiation and the effect of multilayer stack on the transmittance are revealed. The maximum radiation dose（or yield point） endured by the lead glass is found out, and the transmittance expression for the lead glass is given. From the perspective of improving the visual effect of lead glass and the service life, suggestions are put forward for the engineering design and application.