OBJECTIVE: To compare the advantages and disadvantages between laryngeal mask airway anaesthesia combined with sacral canal block and single tracheal tube anaesthesia in pediatric surgery. METHODS: Sixty 2-12-year-old children for lower limb or lower abdominal surgery were randomly assigned into two groups: a group that was given laryngeal mask airway anaesthesia combined with sacral canal block and a group was given single tracheal tube anaesthesia (n=30 each). Mean arterial pressure (MAP), SpO2 and heart rate (HR) were recorded before induction of anaesthesia, before and after insertion of laryngeal mask airway (LMA) or tracheal tube (TT) and after removal of LMA or TT. The waking-up time, VAS pain scores and the frequency of mania were recorded after surgery. RESULTS: There were no significant differences in MAP, SpO2 and HR between the combined and single anaesthesia groups before anaesthesia and insertion of LMA or TT, while the MAP and HR in the combined anaesthesia group were significantly lower than those in the single anaesthesia group after insertion and removal of LMA or TT (P<0.05). The VAS pain scores were significantly lower and the waking-up time was significantly shorter in the combined anaesthesia group than those in the single anaesthesia group (P<0.05) after surgery. The frequency of mania after surgery in the combined anaesthesia group was significantly lower than that in the single anaesthesia group (P<0.05). CONCLUSIONS: The hemodynamics is more stable in children during the induction and the waking-time of laryngeal mask anesthesia combined with sacral canal block. The anesthesia may relieve postoperative pain, shorten the waking-up time and decrease the frequency of mania.