Abstract:Abstract：The research progress of pullulan at home and abroad was analyzed and summarized.The modification methods of pullulan and the application of modified materials were introduced from two aspects of physical modification and chemical modification.The research of the modification of pullulan provided a scientific research basis for further development and application of pullulan.Analysis showed that the modification of pullulan can improve its performance，or provide active groups to make it electronegatable，further expanding the application of pullulan.However，the effect of modification on the molecular structure of pullulan and the substitution position of functional groups had yet to be further studied.