Patients were randomly assigned to two groups, receiving 30min TEAS before anesthesia and 1, 2 , 3 day after surgery respectively. The acupoints of TEAS group are bilateral Zusanli points(ST36) combined with Neiguan points(PC6), and the false stimulation group only attach electrodes without electric current. The frequency of TEAS is set to 2/10 Hz. After surgery, the time of meeting discharge criteria, first flatus and defecation were recorded. Score of PONV, life quality, sleep quality and VAS of pain were evaluated 24, 48 and 72h after surgery. The postoperative complications, re-exploration, cost of hospitalization and adverse events were also recorded.