提供一种卫星故障诊断方法以提高GPS导航定位的完整性。该方法在奇偶向量的基础上利用广义似然比法检测卫星故障 ,再利用神经网络进行故障诊断以提高卫星故障诊断的准确性。 A satellite fault diagnosis method is provided to improve the integrity of GPS navigation and positioning. The method uses the generalized likelihood ratio method to detect the satellite fault based on the parity vectors and then uses the neural network to diagnose the fault to improve the accuracy of satellite fault diagnosis.