As a physical technique

small angle X-ray scatter (SAXS) can be used to study the geometric structure of inhomogeneous electron density zone inside the matter at nanometer level. This review focuses on advantages and features of synchrotron radiation X-ray source SAXS

and the newly progress of its application to characterizations of sol-gel process

synthesis process and structure of zeolite

in particular

the existence behavior of silicoaluminum species in sol-gel system

the influence on synthesis of zeolite and the fractal structure

particle size

mesoporous size

morphology and interface features of zeolite. Finally

the problems existing in SAXS application to zeolite-related researches are discussed and the future research direction is proposed.