The invention relates to an H13 die steel heat treating method and H13 die steel obtained through the same. The H13 die steel heat treating method comprises the steps that a steel ingot obtained through electroslag remelting is heated and forged through the two-time upsetting and two-time stretching technology; three-stage heat insulation treatment is carried out on the forged steel ingot, particularly, first-stage heat insulation is carried out at the temperature of 390-410 DEG C with heat insulation time being 90-100 s/1 mm thick steel, second-stage heat insulation is carried out at the temperature of 640-660 DEG C with heat insulation time being 70-110 s/1 mm thick steel, and third-stage heat insulation is carried out at the temperature of 890-910 DEG C with heat insulation time being 60-110 s/1 mm thick steel. In addition, the invention further relates to the H13 die steel obtained through the H13 die steel heat treating method.