Abstract: Zirconium-containing mesoporous molecular sieve SO42-/Zr-MCM-41 was synthesized. Its structure was characterized by XRD and FT-IR. The results showed that the obtained product was of the characteristics of mesoporous molecular sieve, possessing good long-range order and crystallinity. By FT-IR, it was proved that SO42- has been chemically bonded with the frame of mesoporous molecular sieve and the acidity has been improved, H0≤-12.76. SO42-/Zr-MCM-41 was used as catalyst.In the hydration of turpentine, the suitable reaction conditions were obtained as follows:catalyst:turpentine 7.5% (mass part), monochloro acetic acid:turpentine:water 1:1:3(molar ratio), reaction temperature 60℃, reaction time 8-10 h. Under the above conditions, contents of terpineol reached 60%.