Abstract:This paper taked mixing fruit-vegetable juice as the research object，the effect of heat treatment and ultra-high pressure on the quality of mixing fruit-vegetable juice were studied in order to provide theoretical basis for the application of ultra-high pressure technology in mixing fruit-vegetable juice.The results showed that the ultra-high pressure treatment could well maintain the quality of the product by adjusting different pressures and holding time，the sterilization effect，color，pH value，titratable acid，soluble solids and ascorbic acid content of mixing fruit and vegetable juice were tested.The results showed that the effect was best when ultra-high pressure was 500 MPa and holding time was 5 min.