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In view of the extremely arid climate with high temperature and low humidity, it is easy to cause “burnt flower” and low fruit setting rate and photosynthetic rate decline in jujube trees in Southern Xinjiang. Through field experiments, a set of mist system for jujube orchard canopy was set up with variable mist time and mist times (M1: 3 times a day for 20min each time;M2: 2 times a day for 20min each time;M3: 2 times a day for 40min each time;CK as control, without mist). The effects of different treatments on the flower drop rate and fruit setting rate of jujube trees and the effect of improving the quality of red jujubes were compared, and the best treatment was selected. The result showed that compared with the control, the misting treatment can effectively increase the canopy humidity and lower the temperature, it can increase the air humidity by up to 158.7%, and reduce the temperature by up to 38.9%. The soil moisture content under the misting treatment was generally higher, the soil moisture content of M3 was the highest. Compared with CK, the soil moisture content was increased by 8.44%. Changes in the canopy environment would affect the photosynthetic rate of the jujube leaves and the fixed amount of CO2, the fixed amount of CO2 on the leaves of the jujube under the mist treatment was greater than that of the without mist treatment. Therefore, the accumulation of crop organic matter and the storage of its own energy after the mist was better, which was more conducive to the growth of the crop and the growth of fruits. Through mist, a suitable environment can be created for jujube trees, which had significant effects in reducing flower drop rate, increasing fruit setting rate and fruit quality. The flower drop rate of M1 and M2 treatments was 18.39% and 15.09% lower than that of CK. Mist treatment can indeed regulate the canopy environment, a suitable canopy environment can increase the photosynthetic rate of jujube leaves, promote flowering and fruit setting, and improve the quality of red jujubes. Through this experiment, it was found that three times of mist a day, 20min each time, was the best treatment to obtain high-yield and high-quality red dates.