Cruved blade agitator has good convection circulation ability, and have certain ability of turbulent diffusion, is suitable for application in the mixed, dispersion, particle crystallization, reaction, dissolved, solid-liquid suspension, heat transfer, and so on. The stable sheet structure is an improved form of this kind of turbine, which is mainly applied to the critical point of the shaft design, and the axis needs to be used in the radial direction. Three frame leaf scraper agitator; In laminar flow area, it is suitable for the process of crystallization, extraction, washing, etc., and can also be used in the heat transfer process of high viscosity liquid.