Objective: To replace the traditional non-renewable plastic wrap,the performance of antibacterial plastic film was studied using the economical and environment-friendly raw materials. Methods: Under the best film-forming conditions,the effects of the concentrations of pullulan polysaccharides,sophorolipids and glycerin on the properties of preservative film were analyzed by single factor experiments. Meantime,the optimal inhibitory concentration of sophorolipids was investigated. Then,their suitable concent...