A new method of MEMS-INS/GPS double star integrated positioning is proposed. Using the excellent peculiarity of short time self navigation positioning for MEMS-INS, double star integrated positioning error equation is established. The Kalman filter of double star integrated navigation system is designed with the help of GPS self satellite observation information, which can fuse the information of MEMS-INS and GPS fully. Experimentation results show that double star integrated navigation has higher precision in the condition of bad satellite navigation for GPS.