With the wide application of integrated navigation systems in military and civil fields ,their performance of fault tolerance is facing higher and higher requirement in some significant fields .This article makes an introduction of the frequently‐used fault‐diagnosis methods in integrated navigation systems ,such as state chi‐square test ,wavelet analysis and neural network and so on .And the fault‐tolerant structure of federal Kalman filter is also an‐alyzed .Particularly ,the development of fault tolerance technique is elaborated according to the classification of loosely‐coupled integration ,tightly‐coupled integration and deeply‐cou‐pled integration .The development trend of fault‐tolerance technique in integrated navigation system is proposed to provide a reference for further research of fault‐tolerance technology of integrated navigation system .%组合导航系统在军事、民用领域的应用日益广泛，一些重要应用领域对组合导航系统的容错性能提出了较高要求。本文介绍了组合导航故障检测中常用χ2检验法、小波分析法、神经网络等方法，对具有容错功能的联邦滤波器特性进行了分析。重点按松组合、紧组合和深组合的分类，阐述了组合导航系统容错技术的研究发展情况，并提出了组合导航系统容错技术的发展趋势，为进一步深入研究组合导航容错技术提供借鉴。
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