Winter jujube seedlings are tree species with strong drought resistance and high sorghum resistance. It has a wide adaptability to humidity. The annual precipitation is 100-1200mm, which is suitable for annual precipitation of 400-700mm. Jujube trees have different requirements for humidity during different growth periods. The flowering period requires higher humidity, and 70%-80% relative humidity is beneficial for pollination and fertilization. If the time is too dry and the relative humidity is less than 40%, it will affect pollen germination and pollen tube elongation, resulting in poor pollination and fertilization. The fruit drop is serious and the yield is reduced. The "focus" phenomenon is caused by air drying and low relative humidity. If the rainfall of winter jujube seedlings is too large during flowering, especially in continuous rainy days, low temperature is not conducive to pollination. Pollen is easy to burst, can not germinate normally, and the seed setting rate will also decrease. In the late growth stage of winter jujube seedlings, it is necessary to rain and sunny days. The daytime temperature is high, the nighttime temperature is low, and the temperature difference between day and night is large, which is conducive to sugar accumulation and fruit coloration. Excessive amounts will affect the growth and development of the fruit, and the diseases such as fruit cracking and beating will increase, affecting the quality of winter jujube. Soil moisture affects the water balance of trees and the growth and development of various organs. The field water holding capacity is about 70%, which is conducive to the growth of winter jujube. When the water content of the 30 cm soil layer is 5%, the winter jujube seedlings will temporarily wilting. When the soil moisture content is 3%, it will wither. Excessive water, poor soil permeability, root asphyxia can affect root growth, and long-term water accumulation can also die.