Abstract: LAP-1cocatalyst can effectively lower olefin content in FCC gasoline,but it has negative impacts on the distri-bution of FCC products.The newly developed LAP-2co-catalyst,with the active components and supporter of cata-lyst improved on the basis of ALAP-1,has higher water and thermal stability,hydrogen transfer activity and isomer-ization ability.It can coordinate aromatization and hydrogen transfer reactions,enhance the ability to lower olefin con-tent,and improve distribution of FCC products.