The influence of different cellulose derivatives on properties of starch-chitosan edible films was studied.The structure properties of edible films were characterized by XRD,SEM and TGA.The results showed that the ensile strength of films decreased slowly and tensile elongation increased greatly as the CMCNa content increased.As MC was blended into the films,the ensile strength of complex films increased greatly and tensile elongation changed very little.Antibacterial properties of edible films on Staphylococcus aureus were better than on Escherichia coli.The results of XRD and TGA indicated that strong interaction existed among cellulose derivatives,starch and chitosan.