Objective To analyze the effect of overweight on appendicitis and laparoscopic surgery.Methods Clinical data of 200 patients with laparoscopic appendectomy were analyzed retrospectively.Overweight and non-overweight patients were compared.The risk factors of appendicitis were analyzed.Results The operation time [(56.19 ± 30.42) min vs.(48.40 ± 21.03) min] and length of stay [(5.35 ± 2.04) d vs.(4.52 ± 1.49) d] between the overweight and non-overweight groups had statistically significant differences (t =2.040,P =0.043,t =3.219,P =0.002).Overweight was correlated with appendix inflammation (OR =0.149,P =0.000).Conclusion Over weight patients are prone to develope into complicated appendicitis.It should take surgeon's attention for more difficult operation and more complication.