The results showed that, general characteristics, volume of anesthetic gas, level of sedation, level of pain, proportion of patients with abnormal movements in group D were not significantly different (with p > 0.05) compared with group S The time of extubation, the rate of vomiting and nausea in group D were significantly lower (p < 0.05) than in group S So that', using desflurane to maintain anesthesia in anesthesia treatment of dental pulpitis in children gives good anesthetic effect.