Abstract: Objective To study the different position of the trocars in laparoscopic appendectomy.Methods From January 2017 to December 2018，a total of 120 appendicitis patients were randomly divided into 3 groups，40 cases in each group.In group one，trocar one was inserted through umbilicus，trocar two was inserted at McBurney's point，and trocar three was inserted above the pubic symphysis.In group two，trocar one was inserted through umbilicus，trocar two was inserted at the reverse McBurney's point，and trocar three was inserted above the pubic symphysis.In group three，trocar one was inserted through umbilicus，trocar two was inserted above the left side of the pubic symphysis，trocar three was inserted above the right side of the pubic symphysis.The operative time，the rates of complications，the inpatient stay，the postoperative ache degree and the postoperative satisfaction among the three groups were compared.Results Operative time：the first group was（51.13±20.05）min，the second group was（49.79±19.24）min and the third group was（58.00±15.14）min.There was no significant difference in the operation time between group one and group two（P>0.05），and group two was significantly less than group three（P<0.05）.Postoperative complications：there were 5 complications in the first group，2 complications in the second group and 4 complications in the third group.There was no significant difference among the three groups（P> 0.05）.The pain scores assessed by VAS at 6，12 and 24 hours were as follws：（5.54±1.45），（5.15±1.23），（4.08 ±0.92）in group one，（5.10±1.26），（4.78±1.12），（3.78±1.05）in group two and（5.35±1.67），（5.05±0.96），（4.10±1.08）in group three.Days of hospitalization：the first group was（5.89 ±2.77）days，the second group was（5.85 ±1.85）days，and the third group（5.52±1.83）days.There was no significant difference among the three groups（P>0.05）.There was no significant difference in the postoperative ache degree among the three groups（P>0.05），but the third group had the best postoperative satisfaction（P<0.05）.Conclusion These three different trocar positions are safe and feasible for appendicitis.Group three is more suitable for cosmetic results.

Key words: laparoscopic surgical procedures, appendectomy