A new type of polyurethane-modified epoxy monoacrylates (PMEMA) was synthesized. The resins contained both UV-curable groups (C=C) and heat-curable groups (epoxy). Different UV-curable liquid compositions were developed with different kinds of active diluents. The change of absorption peaks of double bond and epoxy group were identified by FTIR spectra during UV-heat curing process. The gel content, water absorption, mechanical and thermal characteritics of the UV cured films and UV-heat cured films were investigated. The gel contents of UV cured films were lower than 89%, and the gel contents of UV-heat cured films were about 97%. Compared to the epoxy monoacrylates (EMA) systems with same active diluents, the breaking strength of UV-heat cured films of PMEMA system decreased, but its relative elongation increased from 4.9% to 8.0%. The first decomposition temperature of UV-heat cured films was over 230℃.