The invention belongs to the field of aviation and relates to a method for confirming a general laboratory test fault. The method comprises the following steps: (1) collecting 'analyzed fault' of a tested sample from an FMECA report of the tested sample and collecting 'natural fault' of the tested sample from an FRACAS report by a system; and taking the sum of the collected 'analyzed fault' and 'natural fault' as a whole fault set, namely, a general fault confirming scope; (2) when the tested sample is a 'simple device', confirming the 'analyzed fault' as the sum of 'SRU layer fault mode' and 'independent LRU layer fault mode' and confirming the 'natural fault' as 'LRU layer fault mode'; and when the tested sample is a 'complex device', confirming the 'analyzed fault' as the sum of 'LRU layer fault mode' and 'independent LRU layer fault mode' and confirming the 'natural fault' as 'LRU layer or complex device layer fault mode'; and (3) analyzing the 'analyzed fault' and the 'natural fault' of the tested sample, screening and then acquiring the sum of fault, namely, the general fault of the tested sample.