Abstract: With the development of stealth and antistealth technology,electromagnetic wave absorbing material is a current hot research topic in the field of functional material.This paper briefly describes the applications of the polyaniline in radar wave smart stealth,infrared smart stealth and visible light intelligent stealth,and points out the good prospects of the polyaniline in intelligent stealth areas and the problems in use.The recent researches on the functional protonic acid doping polyaniline,polyaniline/inorganic,polyaniline/polymer composite materials are also involved.