The invention relates to edible oil, and in particular relates to soybean oil with functions of protecting health and reducing blood fat. The soybean oil is prepared by mixing raw soybean oil, white tea, eggplant, carrot, thistle, black ants, vervain, eleusine indica and procumbent speedwell. The soybean oil is reasonable in formula; the prepared soybean oil is not easily oxidized, the beany flavor of the soybean oil can be removed, the soybean oil is better in mouth feel, and the vitamin component in the soybean oil can be increased; after being often used as the edible oil, the soybean oil is more obvious in effect of reducing the blood fat.