Abstract: The TS-1 powder，which is synthesized using tetrapropylammonium bromide (TPABr) as template, was molded into catalyst by extruding. The prepared catalysts containing 30％, 50％, 60％ or 80％ TS-1 were used to catalyze the propylene epoxidation to produce PO in a fixed bed reactor. The results show that TS-1 is the active site of the catalyst. The catalyst with 80％ TS-1 has the highest activity and mechanical intensity. The selectivity of PO decreases and the utilization of hydrogen peroxide increases as TS-1 content increases in the catalyst. Both the selectivity of PO and the utilization of hydrogen peroxide increase as the WHSV of propylene increases from 0.30 h－1 to 0.70 h－1. The catalyst containing 80％ TS-1 exhibits 97.8% hydrogen peroxide conversion, 86.4% PO selectivity and 91.8% hydrogen peroxide utilization when the WHSV of propylene is 0.70 h－1.