Metallocene catalyst and application thereof

The invention discloses a metallocene catalyst, and the metallocene catalyst is composed of a central metal, a ligand 2-(2, 3, 4, 5)-tetramethyl cyclopentadienyl-4-alkyl-6-methyl cohnenylphenol, and a halogen atom. The preparation method of the metallocene catalyst comprises the following steps: (1) preparing 2-methylcoxenyl-4-alkylphenol from bromomethylcoxenyland p-alkylphenol; (2) enabling the 2-methyl bowl alkenyl group-4-alkylphenol to react with tetramethyl cyclopentenone, so as to prepare 2-(2, 3, 4, 5)-tetramethyl cyclopentadiene group-4-alkyl-6-methyl bowl alkenyl phenol; and (3) enabling the ligand 2-(2, 3, 4, 5)-tetramethyl cyclopentadienyl-4-alkyl-6-methyl cohnenylphenol to react with TiCl4, so as to obtain the TiCl4-tetramethyl cyclopentadienyl-4-alkyl-6-methyl cohnenylphenol. The metallocene catalyst provided by the invention can be used for catalyzing the copolymerization reaction of ethylene and 5-vinyl-2-norbornene, the polymerization efficiency is high, the content of the 5-vinyl-2-norbornen