1. This stirrer is a new type of axial flow stirrer that can be used for liquid-liquid or liquid-solid two-phase suspension mixing. The arbitrary cross-section of the stirrer's blade consists of a segment of an arc and two warped straight edge segments at both ends, with the outer edges of the two straight segments forming a wavy curve composed of several semi-circular arcs. The blade extends from the end to the root along the central axis of the blade.