The utility model discloses a shell structure of a power tooth cleaner. The vibration head comprises a vibration head shell part and a power vibration mechanism shell part, the vibrating head is characterized in that the vibrating head shell part is a cylindrical accommodating cavity; an annular connector is arranged at the tail part of the vibration head shell part; a flange is arranged on the periphery of the end part of the annular connector; the power vibration mechanism shell part comprises an upper shell, a lower shell and a panel, the end of the upper shell and the end of the lower shell abut against the tail end face of the vibration head shell part, umbrella-shaped plates are arranged on the portions, corresponding to the inner sides of the flanges, of the upper shell and the lower shell, and protruding blocks are arranged on the portions, corresponding to the notches, of the outer sides of the umbrella-shaped plates. Compared with the prior art, the vibrating head has the advantages that the vibrating head is not easy to loosen, and the normal work of the vibrating head is not influenced.