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.