Abstract: According to the characters of regional navigation satellite system,there are some problems that GEO and IGSO satellite may maneuver and less than 4 available navigation satellites could be used during its early building stage.We propose a type of navigation strategy which adopt Receiver Autonomous Integrity Monitoring faults detection,exclusion method and three stars positioning approach and ill conditioning of normal equation resolution to overcome these problems.Then the validation and continuity of navigation satellite system in ordinary application fields can be improved.By handling the actual data,the feasibility of these approaches is verified.