Nowadays natural fibers are used in Automobile industries and Aircraft bodies for outside and inside parts manufacturing. The reason is because the natural fibers are available in cheap and processing of the fibers will be simple and renewable. The composites are made by using the natural fiber reinforcements as they are of low cost and density as well as exhibit better mechanical properties. They are also effective due to easy availability of raw materials and simplicity of manufacturing. In this research paper, the manufacturing of natural fiber (like banana, coir, jute, hemp, etc.) reinforced plastic polymer composites is discussed. The pure glass fiber epoxy polymer composite is tested and compared with sandwiched glass fiber and banana fiber epoxy polymer composite. The important variables that can be required for making automobile parts are taken for this purpose, and the Tensile, Flexural, Impact tests, etc., are tested. In that tests, different strengths were collected. Finally it is concluded that compared with other fibers, sandwiched fibers are in good condition in terms of strength, and their application are also brought into consideration.