Ｏｂｊｅｃｔｉｖｅ　To evaluate the clinical effects of Narcotrend（NT） monitoring in pediatric general anesthesia.　Methods　Sixty children（ASAⅠ-Ⅱ） undergoing tonsillectomy surgery were randomized into two groups （n=30）： anesthetic depth measured with NT group（group N） and the control group（group C）． Anesthesia was induced and maintained with propofol and remifentanil. In group N the depth of anesthesia was adjusted according to NT. In group C， propofol concentration was modulated on the basis of the patient's blood pressure and heart rate and other vital signs. Anesthesia time， operating time， recovering time and extubation time were recorded. The dosage of propofol and incidences of related complications such as dysphoria， nausea and vomiting， perioperative awareness were recorded.　Results　The time of analepsia was significant difference in two groups ［group N（6.2±1.1） min vs group C（14.1±1.8） min（P＜0.01）］， and the extubation time of group N［（11.1±1.0） min］ was significantly shorter than that in group C［（18.5±1.6） min］（P＜0.01）. The dosage of propofol decreaeds significantly in group N［（99±8） mg vs （148±8） mg］（P＜0.01）， There was no statistically significant difference between the two groups on the indences of dysphoria， nausea and vomiting， perioperativel awareness.　Conclusions　In pediatric tonsillectomy surgery， monitoring the depth of anesthesia by NT is a safer way for anesthesia management than empirical administration of anesthetics. It can reduce the incidence of unnecessary excessive use of intravenous anesthetics and shorten the recovery time.