Tung oil anhydride(TM) was synthesized through a Diels-Alder reaction with tung oil(TO) and maleic anhydride(MA) as raw materials.Tung oil-based waterborne UV-curing resin was prepared via neutralizing and hydrating after tung oil anhydride(TM) reacting with hydroxyl ethyl acrylate(HEA). The molecular structure of synthetic product was characterized through the infrared spectra (FTIR) and nuclear magnetic resonance hydrogen spectrum (1H NMR) .The ratio of tung oil(TO), maleic anhydride(MA), hydroxy ethyl acrylate(HEA) and triethylamine(TEA) was considered to be influence on emulsion properties,curing properties and curing film performance of tung oil-based waterborne uv-curing resin.The results showed that the best mole ratio of raw materials was 1:2.5:2.5:2.5. Under this ratio, the emulsion stability,light curing activity and curing film performance are the most excellent.