The reaction rate of bis(2，3-epoxycyelopentyl) ether (W-95) with methylene diani-line (MDA) was determined and compared with that of bis．phenol-A diglycidyl ether (E-54) with MDA by means of infrared spectroscopy，D．C．conductivity measurement and chemical analysis．The apparent energies of activation of the two reaction systems are appoximately equal．If the reaction rates of primary amine and secondary amine with epoxy group of W-95 are k1 and k2，and that of E-54 are k1 and k2 respectively then the reaction rates of k1：k2：k1：k2 were found to be 200：22：20：1．The curing process of a system composed of a mixture of W-95 and E-54 (50／100，W／W) with MDA as curing agent was studied．It has been found that at the early stage of the reaction，the ring-opening of the E-54 epoxy groups is initiated by the primary amines with the formation of linear polymeric chains．Then，the secondary amines in the polymer molecules react further with the epoxy groups of the W-95 to form crosslinked chains．