Cornstarch was treated by ultrasound,microwave and ball milling.X-ray diffraction (XRD),scanning electron microscope (SEM),polarized light microscope and differential scanning calorimetry (DSC) were used to monitoring morphological changes and the crystalline structure of starch granules.Pores or channels were detected in the ultrasound treatment cornstarch (UTCS) granules.X-ray diffraction revealed that UTCS had the A type crystalline pattern of native comstarch,which were no significant changed.