The invention discloses a preparation method for high-lubricity super essential oil. The method comprises the following steps: A, adding isopropyl isostearate A, polyether ester B and hydrotreated base oil to a reaction kettle; B, heating to 60 DEG C and stirring in a machine and pulse mode; C, adding an antioxidant and a corrosion inhibitor to a stirring device; and D, filtering. The preparationmethod is capable of using narrow distillation range, high flash point, and repeatedly hydrotreated base oil in the different viscosities as the base oil, abandoning traditional environment-unfriendlyextreme pressure additives, such as sulphur, phosphorus and chlorine, performing the synthetic polymerization through autonomously developed different vegetable fat, and enabling different syntheticpolymerization esters to be compounded so as to achieve the performance of the sulphur, the phosphorus and the chlorine. In addition, the high-lubricity super essential oil is non-toxic, odorless, andno simulation to a human body, and a product after a polymerization reaction is capable of solving defects that traditional used stanol ester is easily oxidized and tacky, the cost is lower in the follow-up environmental protection treatment, an environmental protection pressure is reduced, and the product reaches or exceeds the performance of imported similar products.