Bisphenol-AF epoxy resin (DGEBHF) was employed to cure bisphenol-A cyanate resin (BACY), and a novel fluorinated polycyanurate copolymer was obtained. The properties of DGEBHF/ BACY copolymer were compared with bisphenol-A epoxy resin (DGEBA)/BACY copolymer. The curing characteristics of DGEBHF/BACY was evaluated by gelation time (GT) and differential scanning calorimetry (DSC). It is found that GT decreases obviously as the DGEBHF concentration increases. The mechanical properties of DGEBHF/BACY were characterized by impact strength (σ_K) and adhesive strength (τ). The results show that σ_K is improved as the concentration of DGEBHF increases. The adhesive strength is optimal when the mass ratio of DGEBHF/BACY is 15/85 and improved clearly compared with BACY. According to dielectric analysis, dielectric properties is depressed by DGEBHF, but the dielectric performance of DGEBHF/BACY is more outstanding compared to DGEBA/BACY. Finally, the thermal stability of cured DGEBHF/BACY was evaluated by thermogravimetric analysis (TGA). It is found that the thermal stability of cured DGEBHF/BACY is depressed by DGEBHF, but DGEBHF/BACY is more stable than DGEBA/BACY under the same conditions.