Environmentally-friendly cooling liquid

The invention relates to an environmentally-friendly cooling liquid, and concretely relates to an automobile engine cooling liquid. The automobile engine cooling liquid is invented to mainly solve the problems of containing of substances harmful to human bodies and environment, easy corrosion to metal parts of an engine cooling system, and low formula stability of present cooling liquids. The cooling liquid comprises 20-60wt% of propylene glycol, 1-20wt% of glycerol, 0.3-5.0wt% of fatty acid, 0.01-1.0wt% of an azole compound, 0.05-2.0wt% of potassium sorbate, 0.01-2.0wt% of sodium hydroxide, 0.001-0.2wt% of an antifoaming agent, 0.001-0.1wt% of a water-soluble dye, and the balance of deionized water. The engine cooling liquid has the advantages of no substances harmful to human bodies or environment, good formula stability, and long-acting corrosion inhibiting ability.