As an important mode of transportation for the “last kilometer” of rail travel, due to the long distance between stations in urban suburbs, the demand for non-motor vehicle parking is increasing, and the unreasonable division of parking areas leads to the decline of traffic efficiency around subway stations. In this paper, the Dongda Chengxian subway station in suburban Nanjing is selected as the case study. Through field investigation and data collection, hybrid traffic simulation is conducted using Anylogic simulation software. Optimization strategies are proposed, and the proposed solutions are subjected to comparative analysis. The results show that by optimizing the parking of non-motor vehicles and increasing the effective road width, the pedestrian density can be reduced effectively and the travel time can be shortened by 7.35%. This study can provide reference for the planning and construction of non-motor vehicle parking areas around subway stations and improving the traffic efficiency of walking space.