It is maleic anhydride modified homo polypropylene (PP) with stable grafting rate, less monomers and gels residual, ultra-low odor. It is especially suitable for blending, alloy and filled polypropylene with ultra-low odor requirements. It can make polypropylene and polar materials have good interface compatibility, greatly improve the impact strength of compounds, reduce the exposure of filler and glass fiber, basically no odor.