The principles of first aid for acute poisoning are as follows: 1. Skin and mucous membrane contaminated with poison: if there is poison on clothes, first take off the patient’s outer clothes and shoes and socks; if the skin is also contaminated with poison, wash the skin with water repeatedly to prevent further absorption of poison from the skin into the body; after the above simple treatment, the patient should be sent to the hospital immediately for observation and further treatment; 2. Inhalation through the respiratory tract Poison: first move the patient from the poisoned environment to a ventilated place to ensure his respiratory tract is open; such a patient may have heavy respiratory symptoms, irritating cough, chest tightness symptoms are more obvious, if there are conditions of oxygen should immediately give oxygen to the patient, and then send him to the hospital; 3, oral poisoning: first, we should induce vomiting, and after sending to the hospital, we should perform gastric lavage or induce diarrhea; before sending the patient to the hospital, we should bring the patient to the hospital by mistake. The poison or the food that may make the patient poisoned should be brought to the hospital for detoxification treatment before sending the patient to the hospital.