The invention belongs to the field of aviation material composites and in particular relates to a manufacture method of a high-temperature resistant glass reinforced plastics mould. Due to the adoption of a glass fiber reinforced polymer based composite technology, the manufacture of a large composite part forming tool can be realized; a glass reinforced plastic forming mould which meets the cost requirement and the usage requirement is manufactured. The invention discloses a low-cost glass reinforced plastic mould capable of being cured and demoulded at 100 DEG C and resisting a temperature of 160 DEG C, so that the rigidity and the temperature resistance of the mould can meet the use requirement; meanwhile, the mould is low in cost and light in weight, and can be used repeatedly; the technical problems of temperature resistance and high cost of a large aviation composite product forming mould can be solved.