Abstract: The influencing factors were studied that relate to the corrosion resistance of 439 stainless steel used in elevators, through surface morphology evaluation and corrosion resistance test for the samples whose alloy element contents, production process and grinding technology were adjusted. The results showed that the corrosion resistance of 439 stainless steel can be improved by improving Cr content, adopting the technology of first grinding and then annealing and pickling, controlling the particle size of abrasive belt and S content of abrasive materials.