Supercharger volute design method and supercharger volute

The embodiment of the invention discloses a supercharger volute design method and a supercharger volute.The supercharger volute design method comprises the steps that firstly, finite element analysis is conducted on a volute model, and volute stress is obtained; judging whether the volute stress exceeds a threshold value or not; when the volute stress exceeds a threshold value, optimizing the volute model; after the volute model is optimized, the steps are repeated until the volute stress is lower than a threshold value; the step of optimizing the volute model comprises the steps of optimizing the outer wall of the volute and/or additionally arranging reinforcing ribs on the outer wall of the volute; the method comprises the steps that finite element analysis is conducted on volute modeling, a structural stress intensity distribution result is obtained and evaluated, and when the stress is high and cannot meet the standard requirement, the volute model is optimized and evaluated again; on the premise that the