Fat-dissolving oil of Chinese herbal medicine for weight loss and preparation method thereof. It belongs to a slimming beauty product and a preparation method thereof. It is based on honeysuckle, lotus leaf, hawthorn, cassia seed, saponin leaves, hemp seed, radish seed, tangerine peel, fleece-flower root, licorice, aurantium, guarana, evening primrose, safflower, ginger, pepper, wild pepper, corn Mustard, Tianqi, mulberry leaf, mulberry, wolfberry, Codonopsis, rhubarb, angelica, lovage, salvia, yam, turmeric, Daxueteng, mugwort, antler, ginseng, Kochia, cabbage, castor bean, raspberry, Atractylodes, Coptidis, Alisma, white peony, radish skin, mirabilite, astragalus, capers, morning glory, euphorbia, and ephedra are crushed, mixed with olive oil, heated and decocted, and the residue is filtered off. When using it, apply it evenly on the parts that need to lose weight and melt fat, and massage repeatedly until the skin is hot. The formula of the invention is scientific and reasonable, convenient to use, non-irritating and painless to the skin, has no side effect on the human body and can exert long-term effect, and enhance skin elasticity and gloss.