The invention belongs to the technical field of moulding dies, in particular to a die insulation structure. The die insulation structure comprises a die plate which is integrally pipe-shaped; insulation plates are arranged on end surfaces of two ends of the die plate; and plate surfaces of the insulation plates cling to the end surfaces of the die plate to form sealing cooperation. By adopting thedie insulation structure, heat loss can be obviously lowered; die heating efficiency is improved; the surface quality of the die plate can be improved; and the product qualification rate is effectively improved while the production cost is lowered.