In view of the poor fault tolerance of the SINS/GPS/DVS fullsource integrated navigation system under nonideal conditions, and the inability to optimize the multisource integrated navigation system, a Kalman filterbased local filter for the navigation subsystem and a federation are established. The global filter of the allsource navigation system of the filter has designed an allsource faulttolerant integrated navigation system. The simulation verification shows that the allsource navigation system can achieve highprecision navigation in the case of subsystem failures, and meet the requirements of critical space aircraft for the accuracy and reliability of the navigation system.