Due to the limited ground TT&C resources and the insufficient coverage of GNSS for deep space navigation, it is necessary to find an autonomous navigation mode. Libration point navigation is a deep space autonomous navigation method using inter-satellite ranging. A simulation program with four modules is designed, and the feasibility simulation is carried out by using the simulation program. Halo orbiting satellite and lunar orbiting satellite with an inclination of 200 km and an angle of 45 degrees are used for ranging, velocity measurement, filtering, navigation and orbit determination. The integrated position error of Halo orbiting satellite is 50 m and that of lunar orbiting satellite is 20 m. This verifies the feasibility of libration point navigation.