To prepare edible film using corn distarch phosphate as the base material and glycerol as the plasticizer. By changing the corn distarch phosphate content, the performance indexes of the edible film such as thickness quantity, mechanical property, moisture permeability, and CO2 permeability were tested to determine the best proportion. It was found that along with the increase of addition amount of corn distarch phosphate, the thickness and quantity of the edible film increased, while the tensile strength, stretch rate and water vapour transmission rate first increased and then decreased, and the CO2 permeability decreased. The experimental results showed that: under the condition of 80 ℃ mixing for 40 min, a drying temperature of 60 ℃ , a starch mass ratio of 7.5% , and a glycerol volume ratio of 5% , the film with the best comprehensive performance was obtained.