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本文利用X-射线衍射，低温氮吸附和核磁共振等物性表征手段，对改性Y型分子筛的结构性质进行了分析与比较。结果表明，Y型分子筛改性后，孔结构发生了变化，形成了二次孔结构，而且孔结构性质的变化与改性方法有关。“,”The porous structure of modified HY zeolites is studied by N2 adsorption. It is found that secondary pores are formed in the modified zeolites,and the formation of a secondary proe system is closely related to the modified methods.