Abstract: Supported NaX zeolite membranes were successfully prepared on the outer surface of α-alumina tube via in-situ hydrothermal synthesis followed by ion-exchange with Co(NO3)2·6H2O for preparing catalytic membranes. The catalytic membrane samples were characterized by XRD，SEM and ICP. Results showed that the formation catalytic membranes was successful with an average thickness of 20 μm and the Co2+ content of about 8.40%. The catalytic contact membrane reactor prepared with the prepared catalytic membrane was used for styrene epoxidation，which exhibited higher catalytic activity than that of particulate catalyst with same Co2+ content. The catalytic membrane can be reused for seven times with high activity and stability，and no Co2+ loss was detected in the reaction system.