Using polypropylene (PP) as the substrate, talc and polysiloxane as additives, talc / polysiloxane / PP was prepared by melt blending. The effects of talc / polysiloxane and talc of different proportions on the PP physical and mechanical properties and scratch resistance were studied. The results showed that compared with pure PP, the bending strength and impact strength of the samples with talc powder were improved, while the tensile strength was reduced. The addition of polysiloxane led to certain improvements in PP’s bending strength, impact strength and elongation at break, and the tensile strength decreased slightly. The crystal morphology and morphology of PP modified by talc were destroyed, and polysiloxane did not affect the crystallization of PP. However, the addition of talc and polysiloxane would improve the crystallization performance of PP. There was a complete spherulite structure in its matrix, and the crystalline peak area was also significantly reduced, which was conducive to crystal formation. By adding talc powder and polysiloxane PP at the same time, on one hand, talc powder increased the hardness of PP to improve the scratch resistance of PP, on the other hand, polysiloxane acted as a compatibilizer in PP, resulting in the good compatibility of PP and talc powder by coating on the surface of talc powder to act as a scratch-resistant agent to reduce the friction coefficient of the material surface, so that the two cooperated to further improve the scratch resistance of PP.