Box structure and motorcycle engine

The utility model relates to a box body structure and a motorcycle engine, the box body structure comprises an upper box body, a lower box body, a locking piece, a gasket and a sealing piece, and the locking piece can penetrate through the lower box body and is matched with the upper box body so as to lock the lower box body on the upper box body; the gasket, the sealing element and the locking element are correspondingly arranged, the locking element can penetrate through the corresponding gasket and sealing element and is inserted into the lower box body, and the part, penetrating through the gasket, of the locking element and the gasket are encircled to form a cavity; the sealing piece is arranged between the lower box body and the locking piece, and the sealing piece can deform and block the cavity under extrusion of the gasket so as to seal the lower box body and the locking piece. According to the utility model, the interaction between the locking piece and the gasket is utilized, so that the sealing pe