<正> A new kind of inorganic polymer, viz. silica-supported polytitazane （Ti-N）, and itsplatinum complex （Ti-N-Pt） were prepared. Cyclohexanone can be obtained in a maximumyield of about 62.2% in the hydrogenation of phenol over Ti-N-Pt at room temperatureunder atmospheric pressure. The effects of mole ratio of N/Pt in the complex, concentrationof the catalyst and reaction temperature on the catalytic activity and selectivity have beenstudied. The complex can be reused several times without loss in its catalytic activity.