Triallyl isocyanurate (TAIC) was synthesized by quaternary ammonium salt catalytic of isocyanuric acid and chloropropene in the solvent of N,N-dimethyl formamide (DMF). The parameters of the process affected on production were investigated. The product was analyzed by high performance liquid chromatography (HPLC), infrared spectroscopy (FTIR) and carbon nuclear magnetic resonance spectroscopy (13CNMR). The results showed that the yield of TAIC based on isocyanuric acid was 93.3% when n (isocyanuric acid): n (chloropropene) was 1:4, the temperature of dropping allyl chloride was 100 ℃, dropping time was 2 h, reaction temperature was 120 ℃, reaction time was 1.5 h, and the catalyst was tetramethylammonium chloride. The purity of TAIC was 97.9% (HPLC).