The invention provides environment-friendly tractor multi-use oil which is prepared from the following components in parts by weight: 48 parts of cyclohexane dicarboxylic ester as base oil, 38 parts of alkyl naphthalene as base oil, 1.7 parts of polymethacrylate, 1.5 parts of antirust agent, 2 parts of efficient antiwear agent, 1.8 parts of efficient extreme pressure agent, 1.8 parts of antioxidant and 0.9 part of friction modifier. The environment-friendly tractor multi-use oil has the advantages that the oil can ensure to have good viscosity retentivity and oxidation control under the conditions of high temperature and heavy load, and the service life of a hydraulic transmission system is prolonged; excellent gear abrasion protection can be provided, balanced friction performance enablesa clutch and a wet brake to be smooth in braking, vibration is reduced, noise does not occur, and the service life of equipment is prolonged; and meanwhile, as ester synthetic base oil is used, the oil has certain degradability and can reduce pollution to environment during field operation.