Cypermethrin is a kind of high efficient broad-spectrum insecticide commonly used in daily life, and the cause of clinical poisoning is often caused by accidental ingestion or suicide swallowing. In the treatment of patients, conscious patients should be emetic, gastric lavage, diaphoresis, rehydration and diuresis as soon as possible, the purpose is to minimize the absorption of toxins, accelerate the excretion of toxins, gastric lavage of patients can be retained in the stomach, such as activated charcoal and other adsorbents, in order to reduce the absorption of toxins in the gastrointestinal tract. There is no specific antidote for cypermethrin poisoning, and its treatment is mainly symptomatic supportive therapy, such as when the patient has convulsions, diazepam can be given for sedation; when the patient has obvious gastrointestinal symptoms, the corresponding gastric mucosal protection can be given to the treatment of medication; for the patient’s liver function damage and other related conditions, the relevant symptomatic supportive protection can also be applied to the medication. If necessary, in order to promote the excretion of cypermethrin in the patient’s blood, blood purification treatment can be given.