The study on intercalation or adsorption of some organic compounds in kaolinite or its surfaces and its stability is made in this paper. The organic compounds include dimethyl sulphoxide, acrylamide and silane coupling agents. The c-axis spacing in kaolinite expands to a large value of 1.1454 nm as a result of intercalation of polar compound into kaolinite. Acrylamide can be intercalated into kaolinite by virtue of dimethyl sulphoxide and is stable in kaolinite after being heated. Adsorption of silane coupling agents onto kaolinite surfaces is also stable and results in the formation of organic kaolinite.