In order to understand the effect of the varying the carbon chain length of the initial resin on curing kinetics and the final properties of the cured products, two resins both contained binaphthalene units were synthesized and characterized by means of 1HNMR and EA. Both epoxy resins were cured with 4,4'-diaminodiphenylmethane (DDM) and their kinetic analyses were performed by Ozawa’s isoconversional method. The activation energy (Ea) of R1/DDM and R2/DDM curing system was 42.34kJ/mol and 56.88kJ/mol. The results indicated that the activation energy (Ea) of the R1/DDM increased while R2/DDM decreased slightly with the increased of the conversion rate (α). The influence of different carbon chain length on the thermal properties, Tg, mechanical property and moisture absorption of the cured epoxy resins was investigated. The results showed that with the increase of the length of carbon chain from C2 to C8, the initial decomposition temperature decrease from 220.3℃ to 210.5℃, the carbon residue rate at 800℃ increase from 3.45% to 6.77%, the Tg increase from 135℃ to 141℃, the elongation at break from 6.7% to 4.3%, and the water absorption decreased from 0.35% to 0.28%.