Technological process and technological parameters of SUS 301and SUS 304 harden temper stainless strip were investigated based on production facility and technics. Technological parameters of surface hardness correlation during cold rolling were analyzed; adjustments of technological process were established; predicting model of percent reduction was built by BP neural network; technology of control surface hardness belonged to BaoXin Company Limited was brought out. After the application of technological process and technological parameters, surface hardness precision was improved.