The invention belongs to the field of an edible oil product and a preparation method thereof, particularly relating to a flavor corn oil and a preparation method thereof. The flavor corn oil is characterized by comprising corn oil and seasoning essential oil, wherein the seasoning essential oil contains at least one component of garlic essential oil, ginger essential oil, truestar anisetree essential oil, cumin essential oil and chive essential oil. Because the seasoning essential oil in the flavor corn oil takes chive, ginger, garlic, cumin, truestar anisetree and garlic as raw materials, supercritical CO2 extraction is adopted, and pure natural essential oil prepared by the molecular distillation technology is adopted. The flavor corn oil has the advantages of high purity and good quality and does not contain food additives, such as essences, sweeteners, strengthening solutions, highly-effective feeding promoting agents and the like, thereby guaranteeing the safety of the flavor corn oil, and simplifying the cooling process. People can choose flavour according to taste, corresponding spices can be avoided in cooking to avoid wasting the spice and improve the use ratio of the spice, and harm on the health of the human body because of degenerative spice can be avoided.