With XRD and IR, the authors conducted studies on the intercalation of acrylamide and salts of fatty acids in kaolinite of coal-bearing strata and its stability. The acrylamide and thesalts of fatty acids were successfully intercalated into kaolinite by virtue of polar organic compounds which acted the part of entrainer. The basic spacing expanded from 7.18A to 11.22Aand 11.32A respectively after the intercalation was perfectly accom-plished in kaolinite. Thephenomenon that organic compounds are intercalated into kaolinite and form a stable interlayeris probably related to the formation of hydrogen bonds between the inner-surface hydroxyls andthe intercalated molecules.