AIM:To analyse results of two different surgical treatment of pterygium.METHODS:The first group of 33 patients(35 eyes),including 2 patients(2 eyes) of recurrent pterygium,underwent pterygium excision combined with free conjunctival flap transplantation.The second group of 32 patients(35 eyes),including 2 patients(2 eyes) of recurrent pterygium,underwent pterygium excision combined with free conjunctival flap transplantation plus mitomycin cotton sheet.RESULTS:After 1a,in first group 1 case(1 eye) had recurrence,the relapse rate was 3.03% of total patients and 2.85% of total eyes.In second group 1 case(1 eye) had recurrence,the relapse rate was 3.12% of total patients and 2.85% of total eyes,1 case had bad conjunctival flap healing and conjunctival flap suture was removed 20 days after operation.No serious complications occurred,such as scleral dissolution.CONCLUSION:Both pterygium excision combined with free conjunctival flap transplantation and pterygium excision combined with free conjunctival flap transplantation plus mitomycin cotton sheet have a lower relapse rate,there is no difference between the two groups.