The invention discloses a preparation method of peeled rapeseed oil. The preparation method comprises the following steps of sorting to remove impurities, peeling, separating, flaking, steaming and frying, mixing, pressing, filtering, and settling, so as to obtain a finished product. The prepared peeled rapeseed oil has the advantages that multiple nutrient ingredients in rapeseed are maintained, and the oil product is more fragrant. The preparation method has the advantages that the harmless and pollution-free are realized, the pure physical pressing is adopted, the industry requirement is met, and the economic and social benefits are obvious; meanwhile, the pigment is reduced along with the peeling, the content of crude protein in the peeled rapeseed oil is effectively improved, the anti-nutrient factors of sinapine, tannin and the like in meal are reduced, and the utilization value of the meal is improved.