An efficient catalyst SO42--TiO2(ST)from industrial metatitanic acid has been successfully prepared to catalyze hydrolysis of ball-milling cellulose.The results show that the highest catalytic efficiency is obtained for ST calcined at 450 ℃(ST-450)with the yield of 21.8％glucose,13.0％5-HMF and 4.2％furfural at 200 ℃ for 30 min.The ball milling of cellulose and solid acid catalyst significantly enhances the cellulose hydrolysis.The high Lewis to Br(o)nsted acid sites ratio for ST-450 induced by bidentate ligands between SO42-and TiO2 benefits high organics yield,and high total acid sites contribute to the high cellulose conversion.The large pore volume of 0.29 cm3·g-1 and appropriate pore size of 7.35 nm of ST-450 also contribute to the high performance.High reaction temperature over 200℃ exhibits negative effect on glucose and 5-HMF yield due to undesired side re-actions,while furfural product is stable in the reaction system.The bidentate ligands between SO42-and TiO2 are considered as active acid sites for cellulose hydrolysis in water-ethanol solvents.