Water distributor capable of checking seal and valve core of backflow-preventing one-way valve for water distributor

The utility model relates to a water distributor capable of being checked and sealed and a valve element of a backflow-preventing one-way valve for the water distributor. The water distributor capableof examining seal comprises a water distributor main body with a water injection hole in the center, a water outlet hole is formed in the cylinder wall of the water distributor main body; a one-way valve communicated with the water outlet hole and the water injection hole is also arranged on the cylinder wall; the one-way valve comprises a valve cavity and a valve element assembled in the valve cavity, the valve element comprises a base body, the base body is provided with a sealing face, the valve cavity is provided with a matching face matched with the sealing face to close or open the one-way valve, and a pressure transmission channel for allowing water to pass through and preventing backflow objects from passing through at the same time to achieve water pressure transmission is formedbetween the sealing face