In order to explore the effects of actinomycetes onthe growthphysiology，yield and quality of jujube trees under desert soil conditionsin southernXinjiang，jujube orchards in typical sandy areasof LuopuCounty，southern Xinjiang wereselected in thisresearch，and four -year-old‘Qiyuexian’jujube trees were grafted asthe researchobject.Three kinds of actinomycetes with different dosageof15，30 and 45 g·plant-1 weretreated，and 0 g·plant -1 was taken as thecontrol， and thegrowth，physiology，yield and fruit quality of jujube trees weremeasured.The results showed that the basal diameter of the first branch of the new jujube treeincreased in August and September compared with thecontrol，especially in the treatment of 30 g·plant-1，but there was no significant difference between the basal diameter of the second branch andthecontrol.The leaf area increased significantly in July and August compared with the control under the treatment of 30 and 45 g·plant-1，but the leaf thickness only increasedsignificantly in July.The relative chlorophyllcontent(SPADvalue) and netphotosyntheticrate(Pn)of leaves were significantly higher thanthose of the control inAugust，July，August andSeptember，while the relative watercontent(LRWC)of leaves with only 30 g·plant -1 treatment was higher than that of thecontrol.InJuly，the activities of superoxidedismutase(SOD)and phenylalanineammonia-lyase(PAL)in leaves treated with actinomycetes weresignificantly higher than those of thecontrol，while the activities of polyphenoloxidase(PPO)were also significantly higher than those of the control except for 15 g·plant-1treatment.ByAugust，the PAL activities of leavestended to thecontrol，and the SOD activities were still significantly higher than those of the control except for 15 g·plant-1， while the PPO activities wereall significantlyincreased.The yield per plant and the weight of superior fruit of jujube under the treatment of actinomycetes wereimproved compared with thecontrol，among which the difference was significant under the treatment of 15 and 30 g·plant-1，and the rate of superior fruit wassignificantlyimproved，but the rate of diseased fruit wasnot significantlydifferent.The soluble solid content of fresh jujube treated with actinomycetes was higher than that of thecontrol inwhite，crisp and complete ripeningstages，especially in 30 and 45 g·plant -1treatments，while the total sugar content and sugar-acid ratio of dried jujube weresignificantly higher than that of thecontrol，and the titratable acid content was significantly reduced in 30 g·plant-1treatment.To sumup，actinomycetes could promote the growth of jujubetrees， enhance someimportant physiological functions of jujubetrees，increase yield and improve jujube fruitquality.In the actual production of jujube orchards in sandy areas of southernXinjiang，30 g actinomycetes could be applied to each plant in combination with basal fertilizer application in spring.