Solid acid Ga2(SO4)3/attapulgite catalyst was prepared by loading Ga2(SO4)3 on attapulgite. The structure of catalyst was characterized by means of IR and XRD. The preparation conditions on catalyst, catalytic activity and stability of catalyst were investigated by synthesis of hexyl butyrate. The kinetics characters of catalytic reaction were discussed as well. The optimum preparation conditions on catalyst were as follow: sulfuric acid as impregnation liquid was 1.1 mol/L, the loading of Ga2(SO4)3 was 25% in catalyst, calcinated at 350 ℃ for 2.5 h. Under the optimum esterificaton conditions, the average yield was 98.1 %. the yield was no less than 85 % after used for 5 times. The results of reaction kinetics showed that it was the second order reaction, and the apparent activation energy was 76.17 kJ/mol.