Abstract:To improve the quality of dried jujube fruit，high-humidity hot air impingement treatment technology was applied to pre-treatment for short-and medium-wave infrared drying，to investigate the effects of highhumidity hot air impingement treatment on the contents of phenols，vitamin C，soluble sugar，triterpenic acid，adenosine cyclic phosphate，total phenols，total flavonoids and antioxidant activities of jujube fruit under different medium and short wave infrared drying temperatures.The results showed that 8 phenolic substances，4 soluble sugars and 4 triterpenic acids were identified in dried jujube fruit under different treatment and drying temperature，among which catechin and chlorogenic acid were the main phenolic substances，sucrose was the main soluble sugar and betulinic acid was the main triterpenic acid.The contents of phenols，soluble sugar，triterpenic acid，vitamin C，adenosine cyclic phosphate，total phenols and total flavonoids in jujube fruit dried by medium and short wave infrared under high-humidity hot air impingement pretreatment were higher than those in untreated control group，indicating that high-humidity hot air impingement treatment technology was an excellent pre-drying method for jujube.