The invention discloses dry-type hot ironing color-changing polyurethane resin. The dry-type hot ironing color-changing polyurethane resin is characterized by comprising carrier resin and water-soluble wax powder, wherein the carrier resin comprises the following raw materials in percentage by mass: 8-15% of diisocyanate, 0-8% of polyether polyol, 8-18% of polyester polyol, 1.5-18% of small molecule glycol chain extender of which the molecular weight is 62-200g/mol, 65-75% of organic solvent, 0.05-0.1% of antioxidant, 0.05-0.1% of chain terminator and 0.05-0.1% of ultraviolet absorbent; the water-soluble wax powder is 5-20% by mass of the carrier resin. In the synthetic process of the polyurethane resin, the carrier resin is prepared by optimizing the proportion of reactants, and mixed with water-soluble wax powder according to the certain ratio, so as to prepare the finished product. The obtained dry-type hot ironing color-changing polyurethane resin has excellent hot ironing discoloration performance, so that the polyurethane resin can be easily ironed and color-changed at relatively low temperature.