Abstract: Taking Wuhan rail transit Xianggang Road Station as an example, the interchange station passenger flow optimization is studied. The optimization method of interchange station passenger flow after starting operation is summarized. Flow optimization process and flow travel time calculation model that are adaptable are proposed. Targeting the conflict points among the passenger flow lines, an optimization scheme is obtained by adopting the process reengineering method, calculated and verified by the passenger flow travel time calculation model. Verification results show that the optimization process and calculation model are feasible and referrable.