Water supply valve of solar water heater

The utility model belongs to a fitting of a solar water heater, particularly a water supply valve for a solar water heater. The utility model comprises a valve body 6, a valve core sleeve 7 and a valve core 8, wherein the other end of the valve body 6 is provided with a pressure relief valve core sleeve 1, and a pressure relief valve core 3 and a water stop wall 4 are arranged in the valve body 6 at the pressure relief valve core sleeve 1; the water stop wall 4 is fixed on the inner wall of the valve body 6, the valve core 8 carry out guide through a guide hole 10 arranged in the valve core sleeve 7, the pressure relief valve core sleeve 1 and the valve body 6 are in threaded connection, the center of the pressure relief valve core 3 is provided with a water injecting hole 12 and the circumference of the pressure relief valve core 3 is provided with flow guide blades 2. The utility model has the advantages of simple structure, convenient operation, high safety and low cost; moreover, the water supply can be carried out as well as the water supply can be automatically sealed when water pressure is overlarge.