Booster pump and water purifier

The utility model discloses a booster pump and a water purifier. The booster pump comprises a base, a booster film, an actuating assembly and a film sealing ring. Wherein the base is provided with an actuating hole; the pressurizing film is installed on the base and provided with an actuating part covering the actuating hole, and a film pressing table is arranged on the lower surface of the actuating part in a protruding mode. The actuating assembly comprises an actuating wheel movably arranged in the actuating hole in the vertical direction, and the actuating wheel is provided with a connecting hole used for being connected with the actuating part and a first sinking groove located in the circumference of the connecting hole and used for allowing the film pressing table to be inserted therein. And the membrane sealing ring is arranged in the first sinking groove, and is fixed in the first sinking groove by being propped by the membrane pressure applying table. According to the booster pump, a novel sealing m