A newly-developed aviation electronic product hardware comprehensive FMECA method comprises the first step of defining a system to be analyzed, the second step of determining fault modes and reasons of appointed layers of a product based on a fault information database, fault mechanism analyzing and a fault module exposure test method, the third step of acquiring fault effects based on a fault simulation analytical method, the fourth step of carrying out the quantification hazard analysis, taking the multiple fault effects caused by the redundancy design into consideration and providing a quantification hazard analyzing method based on the multiple fault effects, and the fifth step of filling in an FMECA table and filling the fault modes, the reasons, the effect and the hazard degree all of which are acquired through analyzing into the FMECA table. The newly-developed aviation electronic product hardware comprehensive FMECA method is a hardware FMECA method based on the fault information database, fault mechanism analyzing, fault mode exposure testing, fault simulating and analyzing and the multiple fault effects, and is capable of providing more objective quantification for design and analyze workers and providing a basis for the design improvement on electronic products.