In case of poisoning by oral administration of potassium permanganate, gastric lavage is carried out with water until the washed out liquid is colorless, and then milk and egg white are administered orally to protect the gastrointestinal mucosa. When laryngeal edema causes asphyxia, immediately tracheotomy, oxygenation, symptomatic treatment. Use antibiotics to prevent secondary infection. Pay attention to water and electrolyte balance. In general, if the oral time is not long can be given to induce vomiting or gastric lavage treatment, if the oral time is long, can be given 20% mannitol oral to induce diarrhea. If the poisoning is serious, hemodialysis can also be used to detoxify.