A series of SnO2-doped (1%-7%,molar fraction)SO42-/TiO2-SnO2 catalysts were prepared by a method of co-precipitation and impregnation.The structures and properties of these catalysts were characterized by N2-adsorption and desorption、FT-IR、XPS、NH3-TPD.The result showed that the specific surface area and pore structure of catalyst were improved,coordination structure with SO42- were formed easily and the amount of acid center on surface were increased observably by doping SnO2. The activity of the catalyst was enhanced caused by these factors.The conversion of camphene was 77.3% and the selectivity of isobornyl acrylate was 98.4% in Esterification reaction of crylic acid with camphene catalyzed by SO42-/TiO2-SnO2 solid acid catalyst doped with 5% molar fraction of SnO2. Compared with SO42-/TiO2, SO42-/TiO2-SnO2 exhibited higher activity and stability.