Abstract: Sensors are important components in a satellite navigation system, so both fault detection and identification for them are of great significance for the reliability improvement of system. In this paper, a sensor fault identification method based on fuzzy logic for the satellite navigation system is presented. First of all, the satellite navigation system is described by the T-S fuzzy model, and then full de-coupled parity equations are applied to detect faults, and a Kalman filter is used to identify fault parameters. Simulation results show that, in case of multiple sensor faults in the navigation system this method can effectively detect them and accurately identify their parameters.