Closestool water inlet valve capable of preventing siphoning

The utility model relates to an anti-siphon closestool water inlet valve, which is provided with a valve body, a water inlet channel, a water outlet channel, a water stop component and a lifting mechanism are arranged in the valve body, the water stop component is arranged in the valve body and can cut off water flow, an isolation cavity is arranged between the water inlet channel and the water outlet channel, and the isolation cavity is fixed on the upper portion of the water inlet channel. The water outlet channel is in an inverted L shape, the end of the vertical portion of the water outlet channel is movably arranged in the isolation cavity, the end of the horizontal portion of the water outlet channel is connected with the lifting mechanism, and a sealing device is arranged between the water outlet channel and the isolation cavity. Compared with the prior art, an anti-siphon mode is different, the anti-siphon effect can be better achieved, and noise can be effectively reduced through the noise reduction