Abstract: The structures of epoxy resins of E 51(bisphenol A diglycidyl ether),AG 80(tetraglycidyldiaminodiphenylmethane), TDE 85(cycloaliphatic aromatic glycidle ester) were characterized by 1H and 13 C NMR, and assignments of the peaks were made by means of 1 H 1H homo nuclear shift correlation(COSY) 1 H 13 C chemical shift correlation(HETCOR).