Considering that GNSS satellite receiver is easy to lose stars in high dynamic situation or in urban canyons,and GNSS satellite receiver may fail in the case of signal interference,we designed a fault-tolerant SINS/GNSS integrated navigation system.In this paper,the design scheme of the fault-tolerant integrated navigation system is described in detail.The various types of abnormalities that may occur are analyzed,and the appropriate treatment strategies are given.The fault-tolerant integrated navigation method can improve the reliability and the accuracy of the system in case that GNSS satellite receiver is abnormal.The simulation test and vehicle test designed for the fault-tolerant SINS/GNSS integrated navigation system achieved good results.