A coupled copolymer is provided. The coupled copolymer is coupled by reacting a silane coupling agent with a copolymer, where the copolymer is polymerized by a conjugated diene monomer and a vinyl aromatics monomer, and the silane coupling agent has an alkenyl group and a alkoxy group, and has a chemical Formula (I) as follows: where R 1 and R 4 are alkyl groups; R 3 is a group having an alkenyl group; R 5 is one of an alkyl and an alkenyl groups; q is one of "1" and "0"; when q = 0, then k = j = 0, 1‰¦ n‰¦ 3, 0‰¦ m‰¦ 2, m+n = 3, and R 2 is alkoxy group; and when q = 1, then k+j = 3, R 2 is -(CH 2 ) r , r = 1-6 and m+n = 3.