The invention discloses a Chinese patent drug for treating toothache, which contains the following material medicines by weight proportions: 3-10 portions of beam root, 25-35 portions of gypsum, 5-15 portions of corn mint, and 5-15 portions of lesser galangal. During production, the gypsum is grinded into powder, then the beam root, the corn mint, and the lesser galangal are mixed and grinded into powder, and then the powders are mixed evenly for making pulvis, then the pulvis is enclosed into a filter paper bag. The medicament disclosed by the invention is lesser but better, can treat the symptoms and root of the disease simultaneously, is applicable for the sufferers with gingivitis, pulpitis, parodontitis, pericoronitis, tip pericoronitis, and other dental disease. The cure rate reaches 93.2 percent, and the total effectivity reaches 98.4 percent. The medicine directly acts on the afflicted part of toothache by external rinse in mouth, the cure on common sufferer can take effect exactly on the same day, the sufferer can be healed within two weeks, dispensing with hospitalization. The usage of the medicine is safer without harmful side effect. So that the patient suffers less pain, with less cost, and can accept the Chinese patent drug easier.