Pre-operative precautions for adenoid hypertrophy include paying attention to diet, paying attention to warmth, making good pre-operative preparation and pre-operative examination. 1. Diet: Because patients undergoing adenoidectomy need general anesthesia, it is necessary to fast for 8⁓12 hours and 4 hours before the operation. Avoid intraoperative vomiting leading to aspiration. 2. Pay attention to warmth: pay attention to warmth before surgery to avoid catching cold and flu. 3. Pre-operative preparation: make good psychological preparation, get plenty of rest, and stop smoking 2 weeks ago for smokers. 4. Pre-operative examination: including blood routine, liver and kidney function, coagulation function and ECG examination. Avoid accidents during surgery. Preoperative precautions and preoperative preparations should be standardized in accordance with the doctor’s instructions in order to ensure a smooth operation and a speedy recovery after the operation.