Preparation method of environment-friendly dewatering rust-proof oil

The invention relates to a preparation method of environment-friendly dewatering rust-proof oil. The dewatering rust-proof oil disclosed by the invention does not contain a barium-containing corrosioninhibitor, and through the synergistic effect of polyaspartic acid and sodium tungstate, the dewatering rust-proof oil has the effects of descaling and corrosion inhibition at a same time. A composite antirust agent is composed of calcium petroleum sulfonate, aluminum stearate, triethanolamine oleate, dibutyl phthalate and dicyclohexylamine octanoate, so that the rust-proof oil produced by the method is not discolored easily; di-tert-butyl-p-cresol is used as an antioxidant, so that the rust-proof oil is not oxidized easily; appearance of workpiece is not affected, comprehensive performance is excellent, and high salt fog resistance, heat and damp resistance, aging resistance and the like are achieved; cleaning performance and dewatering performance are good; and the protection effect onmetal retention is improve