[Objective] The mechanism of the nature change of peanut protein isolated in ultra-high pressure(UHP) processing was preliminarily researched.[Method] The peanut protein isolated being taken as raw material,the effect of UHP treatment on molecular structure was preliminarily researched by means of the method of SDS-PAGE,infrared spectroscopy,differential scanning calorimetry and scanning electron microscope.[Results] It was founded that the subunit of protein molecule was separated by means of the method of...