The invention discloses an environment-friendly fountain solution, which is characterized by being prepared from the following ingredients in parts by weight: 2 to 10 parts of polyoxyethylene isooctyl ether phosphate, 2 to 8 parts of corn starch, 1 to 3 parts of ammonium bicarbonate, 0.5 to 1.5 parts of trihydroxymethyl aminomethane, 1 to 3 parts of nicotinamid, 1 to 3 parts of sodium octane sulfonate, 1 to 3 parts of castor oil, 2 to 8 parts of castor oil maleic acid ester, 0.5 to 1.5 parts of tea polyphenol, 1 to 5 parts of lactic acid, 1 to 4 parts of L-Aspartyl-L-phenylalanine methyl ester, 1 to 2 parts of tea tree essential oil, 5 to 10 parts of auxiliaries and 30 to 50 parts of water. The fountain solution disclosed by the invention has the advantages that the raw material resource is rich, the cost is low, the wetting effect is good, volatile and irritant substances are not contained, the cost is reduced, the fountain solution is mild and harmless to human bodies and environments, and the requirements of energy saving and environment protection are met.