The invention relates to a triglycidyl isocyanurate production method comprising the steps of synthesizing, distillation, crystallization, centrifugation, and drying. Especially, in the distillation process, a solvent which has a boiling point lower than 110 DEG C, which can be subjected to binary azeotrope with epoxy chloropropane, and which cannot be subjected to a reaction with components of the reaction system is slowly added, wherein an addition amount is 5-10% of that of a triglycidyl isocyanurate crude product. The materials are stirred for 20min; through reduced-pressure distillation under a vacuum degree of -0.090MPa to -0.0999MPa, solvent and epoxy chloropropane are removed by azeotrope, wherein a temperature is controlled under 95 DEG C. With the method, preparation process conditions are mild, all ECH solvent can be recovered, working environment can be improved, production cost can be reduced, and the process is stable and safety. Various performance indexes of the product are excellent. With the triglycidyl isocyanurate production method, no epoxy chloropropane residue is caused.