“Vehicle-network” interaction and benefit dispersion are not fully considered in the process of optimal allocation of battery swapping station(BSS). Aiming at this issue, a cooperative game based optimal capacity configuration model of BSS for electric vehicles(EVs)is proposed in this paper. Firstly, an operation sequence simulation model of BSS considering both charging and discharging process is proposed. Based on this, taking the maximized total net profit of alliance between BSS and distribution company(DISCO)as the objective, the safe operation of distribution network and the battery swapping needs of EV users as constraints, a cooperative game based optimal capacity configuration model of BSS is built. One profit distribution mechanism, equal modified disruption propensity(MDP)is introduced to distribute the profit of alliance reasonably in the model which decides the optimal numbers of batteries and chargers initially purchased and the optimal charging-discharging power of BSS in each time. Matlab toolbox YALMIP is employed to solve the proposed model which is a typical mixed integer nonlinear optimization problem. Finally, the feasibility and effectiveness of the proposed method are verified by an actual distribution network.