The invention belongs to the field of edible oil and discloses a technique for preparing refined oil of cornus macrophylla fruits. The technique comprises the following steps: using raw oil of cornus macrophylla fruits as a raw material, degumming, alkali-refining, washing with water, decoloring with high temperature stream, cooling, and filtering to obtain the refined oil of the cornus macrophylla fruits. The technique has obvious decoloring effect and obviously reduces the oil consumption in the decoloring process; and the colorimetric measurement indicates that the color of the product oil completely meets the national standard for first-class edible oil, and the shelf life of the product oil can reach 18 months. Compared with the prior art, the technique has the advantages of simple and easy realization, no use of specific equipment and reagents, low production cost and easy industrialization.