The invention relates to a medicine for treating bovine rumen tympany and belongs to the technical field of veterinary medicines. The medicine is composed of 40-60 g of salt, 40-60 g of garlic, 450-550 ml of vinegar, 80-120 ml of white spirit and 900-1100 ml of water. The medicine has the effects of clearing heat and toxic materials, eliminating cold-dampness, dispelling cold and dampness, removing extravasated blood, treating coagulated cold by purgation, promoting the circulation of qi, restraining bacteria, killing viruses, relieving swelling and pain, cooling blood, warming the spleen and stomach, aiding digestion and the like. The efficacy can reach an affected part directly, the reactivity ability of a forestomach nerve is improved effectively, the rumen contractility and the intestinal tract movement function are improved, stomach invigorating and digestion promoting are achieved rapidly, wind expelling, qi circulation promoting, spleen invigorating for eliminating dampness, detoxifying, pain relieving and treating of both manifestation and root causes of diseases are achieved, and the disease of bovine rumen tympany is cured from the root. The medicine has the advantages of fast curative effect, significant effect, toxic or side effect avoidance, convenient perfusion, safety, reliability and the like.