The invention discloses a terbinafine hydrochloride effervescent tablet, comprising 120-150 parts of terbinafine hydrochloride, 160-190 parts of citric acid, 160-190 parts of sodium bicarbonate, and 20-35 parts of sodium starch glycolate and 15-20 parts of low-substituted hydroxypropyl cellulose, the auxiliary materials include by weight: 285-315 parts of lactose, 20-30 parts of polysorbate 80, 35-55 parts of povidone K30, 70-90 parts of dehydrated alcohol parts and 8-12 parts magnesium stearate. In the present invention, by adding citric acid and sodium bicarbonate, the dissolution of the terbinafine hydrochloride effervescent tablet during use is accelerated. Method, use warm water to accelerate the dissolution of the product in water, stir evenly, and then soak the feet or hands containing the lesions in the liquid medicine. This method of use is targeted and prevents the loss of the medicine. The dosage can be adjusted according to the severity of the lesions, and the effect is fast. , high safety, small side effects, significant curative effect, short treatment time, and a wide range of applicable objects.