Biopesticides which are derived from biological substances such as plants, microbes, etc. aims to control, kill and destroy the harmful pests. They serve their purpose in a target specific way, with no harm to the environment. Nanotechnology which deals with particles less than 100 nm is an emerging field nowadays which is applied in various fields including agriculture. This technology is used to modify the biopestides into nano sized particles to increase its specifity towards insects pests. Plants compounds having pesticidal activities can be used to synthesize nanobiopesticides in various methods like biological,physical or chemical. In this review the importance of different nanobiopesticides and their action have been discussed.