Preoperative precautions for pediatric strabismus generally include dietary contraindications, preoperative examination, avoiding overuse of the eyes, etc., which should be prepared under the guidance of the doctor. 1. Dietary contraindications: A balanced diet should be observed before the surgery. If the child is young, he/she should keep an empty stomach on the day of surgery to avoid vomiting during the surgery. 2. Pre-operative examination: Before the operation, you should do a general examination, such as blood routine, electrocardiogram, blood glucose and refractive status, etc., and the results of the examination are not abnormal, so you can go on with the surgical treatment. 3. Avoid excessive use of eyes: children should pay attention to eye hygiene before surgery, avoid excessive use of eyes leading to eye fatigue, appropriate rest to ensure good condition. Pediatric strabismus should be well prepared before surgery under the guidance of the doctor to avoid adverse consequences during surgery.