Abstract: In the process of shield tunnelling, the driving parameters should be selected appropriately according to the geological conditions. The correct choice of driving parameters can effectively improve excavation efficiency, reduce tool wear and maintain excavation face stability. In this paper, orthogonal tests of driving parameters are carried out based on the construction practice of a metro running tunnel section. Through collection and analysis of shield driving parameters, a parametric model of shield driving speed is established. The model parameters are optimized using the fastest driving speed as the goal function with the result of obtaining the optimal driving parameters of the shield construction in mixed ground. The research results provide a theoretical basis for setting shield tunnelling parameters under the same ground conditions, and provide a reference for shield construction in other strata.