Tail end sterilizer

The utility model provides a tail end sterilizer which comprises a shell, and a UV (ultraviolet) sterilization light source, a storage battery and a micro water flow generator are arranged in the shell. The micro water flow generator is located in the water inlet pipeline or the first water outlet channel of the shell, a light-transmitting area is arranged on the wall body of the second water outlet channel of the shell, and the light emitting angle of the UV sterilization light source faces the light-transmitting area. And a first valve and a second valve are respectively arranged on the first water outlet channel and the second water outlet channel. When sterilization is not needed, the first valve is opened, and water flow enters the first water outlet channel to drive the micro water flow generator to generate electricity. When sterilization is needed, the switch between the storage battery and the UV sterilization light source is closed, the second valve is opened, water flow enters the second water outl