This research was carried out to investigate the possibility of improving the strength properties, especially the impact resistance of plastic wood composites by adding carbon nanoparticles GNPR to using the automotive industry. For this purpose, the nanocomposite must have a low density and high impact resistance. In this research used 40% and 55% of bagasse particles with 40 meshes, four GNPR 0, 0.25, 0.5 and 1%, polypropylene polymer and 2% maleic anhydride polypropylene. in this study Nanocomposites were produced by using an internal mixer and then samples of density test, impact and flexural strength were produced by two-stage hot and cold press. After reviewing the results of physical and mechanical tests, it was found that increasing the consumption of bagasse particles in the composition of nanocomposite increases the density, flexural modulus and water absorption of the product, but decreases the impact resistance and bending strength. Also, Increasing carbon nanoparticles GNPR also increases the impact strength and flexural strength of the nanocomposite. SEM microscopic examination revealed the uniform distribution of carbon nanoparticles GNPR at the fracture surface of the impact specimens and improved bonding between bagasse and PP particles, Also, by increasing the use of carbon nanoparticles GNPR.with increasing carbon nanoparticle consumption, the glass transition temperature of nanocomposites increased. The study of the material modulus in the DMTA test indicated that the value of the modulus increases with increasing bagasse quantity.