Aimed at the limitation of the Beidou double-star system’s military application value, a local passive position scheme was put forward by using imitate satellite aided to aid Beidou double-star system. The sight-distance range of one imitate satellite aided was analyzed. The location error arguments of the passive position method of “double-star + one imitate satellite aided + altimeter” within the sight-distance were simulated. The simulation results show that this scheme is feasible, which can enhance the security and the military application value of the system.