1　前　言近几十年催化裂化技术发展很快 ,特别是催化剂的发展更是日新月异 ,新品种不断涌现。但某些催化剂的发展也带来了副作用 ,主要表现为目的产品收率降低 ,二次反应生成的副产品增加 ,降低了装置的经济效益。本文报道了大庆重油催化裂化装置应用终止剂的经验及使用中需要 1 Foreword In recent decades, catalytic cracking technology is developing rapidly, especially the development of catalysts is changing with each passing day, new varieties continue to emerge. However, the development of some catalysts also brings about side effects, which are mainly manifested as the decrease of the yield of the target product, the increase of the by-products generated by the secondary reaction, and the lowering of the economic benefit of the device. This paper reports on the experience of Daqing Heavy Oil Catalytic Cracking Unit and its application