A soluble non-crosslinked C-70-p-methylstyrene (C-70-PMS) copolymer was prepared in sodium naphthalene-initiated anionic polymerization reaction. This copolymer exhibits the lower intrinsic viscosity and higher absolute molecular weight compared with linear polystyrene at equal retention time, suggesting that the copolymer possess star-shaped structure. The covalent graftings of multiple poly (p-methylstyrene) (PPMS) chains onto the C-70 core result ill the math-ed enhancement of the absorption degree at longer wavelengths, and in the increase of glass transition temperature. Like pure PPMS, C-70-PMS copolymer also exhibits the higher solvency in common solvents.