Abstract: The catalytic activity and performance in long operation of ZSM-5 catalyst for post-MTBE C4 aromatization in a fixed bed were studied. The results indicate that at the optimal reaction conditions of 380℃，2.0MPa, WHSV of 2.0h-1 and H2/oil volume ratio of 300, the conversion of olefin exceeds 99%, the yield of dry gas is less than 2.0%, the yield of C5+ is 35%~41%, the yield of LPG is 57%～64%, the yield of aromatic is 10%～12%, and the catalyst shows a stable performance. After 984 h running, the coke deposition on the catalyst is 11.56% and no deactivation of the catalyst is observed. The gaseous product is an excellent material for ethylene production.