The edible films were made mainly by hydroxypropyl distarch phosphate with pullulan,glycerol and water.Effects of extrusion temperature,screwing speeds and water content on the mechanical properties,water vapor permeability and thermal properties of the films were studied.The results indicated that,the comprehensive properties of the film was better under the conditions of extrusion temperature of 140℃,screwing speeds of 30rpm and water content of 25%.The elongation after the break and water vapor permeability were superior than the controls.Therefore,these conditions could be the optimal parameters during the melt-extrusion process.