Abstract: 1. In this paper, the new and efficient broad line Na²³-NMRtechnique was first applied to investigate the existence and growth of nucleation center with faujasite type structure in a highly disperse colloidal system and some interesting results were obtained. This technique supported a possibility to study the nucleation processes of zeolite in a colloidal system.2. The nucleation processes of the so-called "directing-agent" (highly disperse colloidal system with a composition of 16Na₂O ·Al₂O₃· 15SiO₂·320H₂O) have been investigated by broad line Na²³-NMR, X-ray diffraction, electron diffraction technique. The structure of the colloidal particles in the "directing-agent" system has been verified to be of the faujasite type. It is the nuclei that enable NaYtype zeolites to be formed in the starting mixture in which NaPtype zeolites should be formed.