The invention discloses a hydraulic PU pressing color-changing resin for synthetic leather; the hydraulic PU pressing color-changing resin is constituted by the following raw materials by weight percentage: 35-45 percent of waterborne polyurethane, 25-35 percent of water, 5-15 percent of silicon dioxide color changing powder, 5-10 percent of extinction powder, 0.3-1 percent of organic silicon flatting agents, 1-3 percent of silicone defoaming agents, and 0.5-2 percent of waterborne polyurethane thickeners. The hydraulic PU pressing color-changing resin for synthetic leather takes water as solvent, toxic solvents such as dimethyl fomamide and butanone are replaced, therefore, the hydraulic PU pressing color-changing resin has non-inflammable, safe, environmental-protection, cost-saving performances, and the pressing color-changingresin has the advantages of good film forming property, firm adhesion, solvent-proof, cold-resistance, hydrolyzation-resistance and heat-proof ageing coating. The finished products manufactured by the pressing color-changing resin has the advantages of full handle, good pressing double-color effect, fine and smooth texture, good air permeability and the like.