Natural fiber-reinforced polymer composite materials are quickly growing both in terms of their industrial applications and primary research as they are renewable, low, completely or partially recyclable and eco-friendly. In order to produce cost effective polymer reinforced composites and to reduce the destruction of ecosystem, researchers have come up with new manufacturing trends for composite using natural fibers which are partially biodegradable, for which plants such as flax, cotton, hemp, jute, sisal, kenaf, pineapple, banana, wood etc., used from time immemorial as a rich source of lignocellulosic fibers are more often applied as the reinforcement of composites. The chemically treated natural fibre shows better improvement in properties than untreated fibres. The chemically treated natural fibre has improved interfacial adhesion between fibre surface and polymer matrix. Natural fibre reinforcements have shown better results in impact toughness and fatigue strength. This review aims at explaining about the research and development in the improvement in properties of natural fibre reinforced polymer composites along with its application.