Ｏｂｊｅｃｔｉｖｅ　To evaluate the effects of different types of anaesthesia on postoperative behavioural changes following adenotonsillectomy under general anesthesia(GA) in children.　Methods　Ninety children undergoing adenotonsillectomy under GA were randomly divided into 3 groups(n=30): inhalational anesthesia group(group S), Combined intravenous-inhalational anesthesia group(group SP), total intravenous anaesthesia group(group P). According to post hospitalization behavior questionnaire (PHBQ), the incidence of negative postoperative behavioural changes (NPOBCs) was evaluated on postoperative days(POD) 1, 3, 7, 15, and 3 months after surgery.　Results　Compared with group S, the incidence of NPOBCs on POD 7 and 15(18 and 10) and the overall number of NPOBCs of each child (11±8) in group SP were both lower(P＜0.05), the incidence of NPOBCs on POD 3, 7 and 15(20, 16 and 8) and the overall number of NPOBCs of each child (6±6) in group P were also significantly lower(P＜0.05), compared with group SP, there was no significant differences in incidence of NPOBCs, but overall number of NPOBCs of each child in group P was fewer(P＜0.05).　Conclusions　Compared with inhalational anesthesia and combined intravenous-inhalational anesthesia, total intravenous anesthesia reduce the incidence of NPOBCs in children.