The property improvement of starch-based edible film by pullulan was studied.The surface of the film was observed with the optical microscope.The result showed that the tensile strength of the starch film was improved effectively by adding pullulan;water dissolution time was shortened and oxygen permeability of the starch film was reduced.When pollulan was 5%~9% in the solution,water permeability was also decreased;the whiteness value of the film was increased and the yellowness value was lower.The optical microscopy analysis of the film surface suggested that the pullulan and the starch were fused better at 9% of pullulan.The conclusion was: the best properties of the starch film was when pullulan's concentration less than 9%.