The invention discloses a preparation method for high-purity titanium nickel copper shape memory alloy ingots, and relates to the technical field of shape memory alloy preparation. Raw materials are screened, cleaned and dried; the raw materials comprise sponge titanium particles, electrolytic nickel particles, high-purity copper particles and phosphorus copper intermediate alloys; after the driedraw materials are weighed, the materials are paved in a smelting furnace in sequence according to a first preset condition; the materials are smelted according to a vacuum induction smelting technology, wherein the smelting process comprises power supply, degassing, refining and casting; the aftertreatment is performed on ingots after casting according to a second preset condition by adopting a hot isostatic pressing method; and then, the flaw detection, the riser cutting and the bottom cushioning are performed on the ingots after aftertreatment in sequence to obtain high-purity titanium nickel copper ingots. The preparation method achieves the technical effects of convenience to prepare the ingots, controllable and lower content of impurity element O, high content stability of the O element, fine grain structure and great reduction of metallurgy defects.