Using a transmission electron microscope equipped with an energy disper-sive spectrometer(AEM), the authors have detailedly analysed and studied the mode of occurrence of iron and titanium in the kaolin deposit. The AEM study has revealed two distinct forms of iron and titanium inthe kaol in deposit: (1) Fe(3+) and Ti may substitute for Al in the octahedral layer and evenly distribute theinselves throughout the lattice in the kaolin minerals, which convincingly suggests that Fe and Ti are structural components of the kaolin minerals, called structural iron and structural titanium respectively. (2) There are separate iron and titanium minerals existing as impurities,such as hematite, maghemite, goethite and anatase. It is found that the iron minerals are present either as absorbed iron minerals on the surface of kaolin mineral flakes or as fine separate iron minerals, and that structural iron and structural titanium constitute only a small proportion, with most iron and titanium present as separate iron and titanium minerals. Based on the above studies, the authors have presented in this paper a feasible technological process for reducing Fe and Ti content of kaolin, which Provides a dependable scientific basis for improving the quality of kaolin, raising its ecoromic value and putting the kaolin resources to rational use.