Axial flow type, horizontal annular flow and axial flow at low speed, radial flow and axial flow at high speed. Due to the change of the blade section, the discharge flow at each point has a large change. The small paddle opposite to the main propeller's inclination direction enhances the vortex at the end of the blade, making it have better mixing performance, which is better than the traditional A220 pitched blade propeller. The formula reduces the mixing time by 30%. Generally used in combination with multi-layer agitators, it is suitable for mixing, dissolving, solid suspension, crystallization, and heat transfer operations of heterogeneous phases.