Abstract: Silicotungstic acid lanthanum catalyst was synthesized by solid-state interaction under microwave heating.It was also characterized by FT-IR and XRD.With catalytic synthesis of cyclohexanone glycol ketal as probe，the influences of the amount-of-substance ratio of cyclohexanone to glycol，catalyst dosage，reaction time，dosage of water-carrying agent，and catalyst reuse times on catalytic activity were investigated.The study found that silicotungstic acid lanthanum had good catalytic activity to catalytic synthesis of cyclohexanone glycol ketal.Furthermore，the synthesis of lanthanum silicotungstic acid was simple，and the reuse performance of catalyst was good.Under the optimum reaction conditions，the yield of cyclohexanone glycol ketal was 84.0%.

Key words: solid-phase synthesis under microwave, silicotungstic acid lanthanum, catalytic synthesis, cyclohexanone glycol ketal