Crankcase sealing structure of two-stroke engine

The utility model discloses a two-stroke engine crankcase sealing structure and relates to the field of two-stroke piston engines, the two-stroke engine crankcase sealing structure comprises a shell, a front sealing lip and a rear sealing lip, the shell is connected into a crankcase in a sealed mode, a shaft body is rotationally connected into the crankcase, and the front sealing lip and the rear sealing lip are connected to two mounting surfaces at different positions on the axis of the shell. Inner rings of the front sealing lip and the rear sealing lip are in contact with the shaft body; the front sealing lip and the rear sealing lip each comprise an outer ring and a conical cylinder part, the large-diameter section of each conical cylinder part is integrally connected to the inner ring position of the corresponding outer ring, and the small-diameter ends of the conical cylinder parts of the front sealing lip and the rear sealing lip deviate from each other. A better two-way sealing effect is achieved, and