The　helicity-dependent　photoconductance　of　the　edge　states　in　three-dimensional　topological　insulator　Bi2Te3　films　is　investigated.It　is　revealed　that　the　helicity-dependent　photoconductivity　current　on　the　left　edge　of　the　Bi2Te3　film　shows　an　opposite　sign　with　that　on　the　right　edge.In　addition,the　helicity-dependent　photoconductivity　current　increases　linearly　with　the　applied　longitudinal　electric　field,and　it　reverses　the　sign　with　the　reversal　of　the　electric　field.As　the　thickness　of　the　Bi2Te3　film　increases,the　helicity-dependent　photoconductivity　current　also　increases.Theoretical　analysis　suggests　that　the　helicity-dependent　photo-conductivity　current　may　come　from　the　intrinsic　spin　orbit　coupling(SOC)or　the　SOC　introduced　by　the　chiral　impurities　or　defects.