The invention discloses a chiral catalyst and a preparation method thereof. With camphoronic acid as a raw material and with phenylglycinol as an oxazoline precursor, through chlorination, condensation, cyclization, reduction and diphenyl chlorophosphine connection, the chiral catalyst is finally synthesized, namely 2-((1R,2R,4R)-2-diphenylphosphine oxo-7,7-dimethyl bicyclo-[2.2.1]-1-heptyl)-4-phenyl-4,5-dihydrooxazole. A stable skeleton and an easy derivatization characteristic of chiral camphor are used, catalytic advantage of oxazoline and high-efficiency selectivity of a phosphorous-containing ligand are combined as a whole, the types of the camphor derived organic small molecular catalyst and oxazoline are expanded, a synthetic route is designed for developing the new environmentally-friendly chiral catalyst, the environment is facilitated to be protected and the resources are saved.