AIM:To observe the effects of surgery for concomitant exotropia and analyze the influential factors.METHODS:One hundred and twenty-five cases of concomitant exotropia surgery in our hospital from 2000 to 2009 were retrospectively analyzed.RESULTS:The short-time and long-time cure rates of 125 cases were 80.8%and 77.5% respectively.The rate of regression of eye position was 3.3%.CONCLUSION:Concomitant exotropia surgery can improve not only the appearance but also the function of the eye.The therapeutic effect is related to many factors such as operational principle,patient’s facter operative reaction and so on.