Objective To investigate the effects of intravenous infusion of lidocaine on colorectal resection.Methods Sixty patients undergoing colorectsl resection were randomly divided into group L [receiving intravenous infusion of 1%lidocaine,bolus injection of 1.5 mg/kg lldocaine at induction of anesthesia,followed by a continuous infusion of 1.5 mg/(kg·h)intraoperatively and for 12 h postoperatively]and group C(an equal volume of saline).Postoperative pain scores(VAS score)and morphine consumption were measured.Times of flatus and first defecation were recorded.Results The end expiration sevotturane concentration maintaining hemedynamics stable in group L was lower than that in group C(P<0.05).The dose of sulfentsnyl was(17.5±3.8)μg in group L,(25.6±4.5)μg in group C,there was significant difference between two groups(P<0.05).The times of flatus first,defecation and morphine conaumption at 24 and 48 h after operation in group L were lower than those in group C[(23±6)h vs(28±7)h,(31±7)h vs(43±9)h,(32±6)mg vs(46±8)nag and(58±7)mg vs(71±10)mg,P<0.05].There was no significant difference at resting VAS score,but there was significant difference at movement and cough VAS score between twp groups(P<0.05).Conclusion Perioperative administration of low doses of intravenous infusion of lidocaine reduces intraoperative anesthetic requirements and has a clinically relevant beneficial effect on postoperative recovery after colorectal resection.