The invention relates to the health care food field, and concretely relates to a kind of health-care rapeseed oil with functions of tonifying deficiency and strengthening kidney. The rapeseed oil is prepared from the following raw materials, by weight, 1300-1400 parts of rapeseeds, 42-55 parts of peanut kernels, 35-40 parts of pine nuts, 20-22 parts of safflower seeds, 6-8 parts of rosemary leaves, 10-12 parts of roxburgh rose dry fruit, 4-5 parts of fructus polygoni orientalis, 8-10 parts of cassia twig and 10-12 parts of semen coicis, 8-10 parts of radix astragali, 9-12 parts of prepared rehmannia roots and 8-12 parts of tremella. The raw materials of the rapeseed oil contain a plurality of oily plant materials rich in linoleic acid, a plurality of natural Chinese herbal medicine components, and components of roxburgh rose dry fruit and rosemary leaves and the like with excellent health care values, and an environmentally-friendly and high-efficiency subcritical carbon dioxide extraction technology is employed. The rapeseed oil has rich aroma, has health care functions of invigorating spleen, tonifying kidney, inducing diuresis to alleviate edema, tonifying deficiency, clearing damp and the like, enhances body immune functions, delays senescence, has functions of tonifying deficiency and strengthening kidney, and especially is suitable for daily health care of older customers.