Four 1,3-thiazolidine chiralligands with various aromatic substituents were synthesized by condensation of L-cysteine or its ester with aldehyde or ke-tone.The catalysts prepared by the reaction of these ligands with I Rh(COD)-Cl]2 were used to catalyze the asymmetric hydrosilylation of acetophenone.TWO high reactive and selective chiral ligands with pyridyl were sifted.The chemical yield of the catalytic reaction is up to 90%,the optical yield could reach about 80%(e.e).The coordination structure of the catalysts was discussed.