The HQ three-leaf backward-inclined impeller is a radial flow impeller. Due to the effect of the backward angle of the blades, the radial vortex generated is relatively small. Coupled with finger-like baffles, it can achieve a large flow of up and down circulating flow, improving shear force while saving 15% of power. It is suitable for unit operations such as mixing, gas absorption, mass transfer, and polymerization reactions.