Ultra -hig h pressure technolog y is one of the most popular methods in food process.This paper reviews the situation and the development of ultra -hig h pressure processing technolog y in food industry,including the effects on micro -org anisms,protein and enzyme,fat and lipoid,polysaccharide,g el,the sensory and nutritional properties of foods and so on.The prospect,the importance and the present problems of ultra -hig h pressure applied in food industry are also mentioned in this paper.