Abstract: This paper presents the selection rules of satellite-used capacitors failure examples and the methods of raising applied reliability of tantalum capacitors.Four viewpoints are put forward:①Solid state tantalum capacitors should not he used in power supply filters;②The reliability of solid state tantalum capacitors is related to the serial resistance in a circuit;③Liquid state tantalum capacitors are susceptible to vibration, and it is possible to produce transient electric potential;④ There is low voltage failure in multi-lager ceramic capacitors.Finally by analysing the special failure phenomenon and mechanism of capacitors, some available screening methods are proposed.