［Objective］To address the limitation of insufficient mechanical strength in tung oil-based cured films，a tung oil-based epoxy resin with high epoxy content was developed and a high-performance cured film was constructed.［Method］ Tung oil-based triglycidyl ester was preparedusing tung oil acid as the raw material to react with maleic anhydride and epichlorohydrin. The doublebonds were epoxidized to obtain epoxy tung oil-based triglycidyl esters（ETME'） with high epoxy content，which was then thermally cured with bio-phenolic tannic acid to construct tung oil-based epoxy cured film.［Results］ ETME' with epoxy equivalent of 188. 75 g/mol was successfullysynthesized. When the molar ratio of phenolic hydroxyl in tannic acid to epoxy groups in ETME' was 2. 5∶1，the gelation rate of the ETME'-based cured film could reach 97%，the tensile strength exceeded 10 MPa，the pencil hardness was 4H，as well as the cured film possessed excellent thermal stability and good adhesion.［Conclusion］ An effective construction strategy for the development of high-performance tung oil-based epoxy cured films by the synergistic effect of bio-phenolic curing agentsand tung oil-based epoxy resins with high epoxy content was proposed.