Bidirectional impeller with adjustable propeller of axial flow fan

A bidirectional impeller with an adjustable propeller of an axial flow fan relates to the axial flow fan and is characterized in that a shaft sleeve body is composed of a shaft sleeve base and a shaft sleeve cover. The shaft sleeve base is formed by integrally extending an inner circle and an outer circle of a ring disk respectively into an inner shaft sleeve and an outer hollow cylinder, and three semi-circular-like holes with a radian smaller than that of a semi-circle are distributed evenly on the end face of the outer hollow cylinder. The shaft sleeve cover is in a shape of a butted hollow cylinder formed by integrally extending an outer circle of the ring disk, and three semi-circular-like holes with a radian smaller than that of a semi-circle are distributed evenly on the end face of the butted hollow cylinder. A connecting base at the propeller shank is in a shape of a ring disk body formed by integrally extending two end faces of a cylinder, the shaft sleeve cover is sleeved on the outer circle of the