In this paper , H β \|zeolite was modified by B and SO 4 2- /Fe 2O 3, respectively. Variation of acid properties on surface of the modified catalyst and the effect of the variation on catalytic activity and stability for the etherification of FCC light gasoline were studied. The results show that strong acid total content of Lewis acid was increased by loading two modifiers, while olefin conversion was increased. The selectivity and stability of B modified catalyst were higher than that of SO 4 2- /Fe 2O 3 modified catalyst. The optimum content of active components on the modified catalyst was about 1.0%.