The invention discloses a traditional Chinese medicine hydrogel plaster for reducing belly fat. The hydrogel plaster for reducing belly fat comprises a base material and a traditional Chinese medicineointment attached to the surface of the base material, the Chinese medicine ointment is prepared by a traditional Chinese medicine composition comprising the following components: hemp seed, magnoliacortex, bitter orange, cassia seed, aloe, lotus leaf, crataegus pinnatifida, oriental waterplantain rhizome, corn silk, rhizoma atractylodis, dried orange peel, Concha Arcae, red sage root, safflower, loofah sponge, turmeric, curcuma tuber, phellodendron amurense, lithospermum , asarum herb, mugwort floss, dried ginger, and natural indigo. The traditional Chinese medicine hydrogel plaster of theinvention is used for sticking on the abdomen with a fat accumulation position, so that the medicines in the plaster are fragrantly spread and percutaneously spread, the plaster has the functions of warming meridians and regulating vital energy, opening channels and collaterals, activating blood circulation to dissipate blood stasis, moistening intestines, and relaxing bowel, and the treatment effect for the patients with simple obesity is good. Clinical trials verify that using the plaster of the invention for more than 2 courses can effectively reduce belly fat, and the total effective ratecan reach 86.7%. The plaster is easy to use, straight to the lesion, easy to clean, and easy for the patient to use.