The invention discloses a mold heat treatment process for preventing cold stamping mold failures. The mold heat treatment process comprises the following steps that a cast cold stamping mold is subjected to heat preservation after being preheated, and a preheated mold is obtained; the preheated mold is added into a vacuum quenching furnace, and heat preservation treatment is carried out at a high temperature; after being precooled, the mold subjected to heat preservation treatment is added into a low-temperature salt bath, circulating water cooling is carried out after soaking, and quenching treatment is completed; the mold obtained after quenching treatment is subjected to tempering treatment at a high temperature, and after heat preservation is completed, air cooling is carried out to the room temperature; and tempering is repeatedly carried out, and the mold obtained after tempering treatment is subjected to mechanical polishing treatment. Compared with the prior art, the mold heat treatment process for preventing the cold stamping mold failures has the beneficial effects of being simple in process, high in percent of pass of finished products and low in cost; the mold obtained through the process has high anti-deformation capacity, high toughness, high wear resistance, high corrosion resistance and high fatigue resistance; and in actual application, the service life of the mold is long, the early-stage failure rate is greatly reduced, and the mold is worth of popularization.