One of the main infrastructures in rail transportation is metro station. Obviously, analyzing and improving the capacity of the stations will ultimately lead to improved performance of the overall network. The capacity of metro station is the ability of the station and its associated spaces to create safety and comfort for the number of passengers expected to use the station. In this research, volume of passengers in the Shohada Square metro station has been used and simulated using VISSIM software. By the results of the simulation and regarding TCRP manual, six scenarios were analyzed in this research and different conditions were evaluated. Two main solutions for improving the performance of station were considered. It shows that the decision to remove the manual ticket purchase location will result in a 43% improvement in the performance of control space section and the approach to reducing the headway of trains from 240 s to 180 s will increase the amount of accessible space for each pedestrian in the platform to 35%. The method presented in this study can be used to evaluate and analyze other metro stations and even other transportation network stations.