Abstract: Using statistical methods and ArcGIS refined spatial interpolation technology,this paper studied the temporal and spatial changes of elements such as the number of rainfall days,the amount of rainfall,the number of cloudy and rainy days and the amount of rainfall during the ripening period（august-september）of wine grapes in the northern slope of Tianshan Mountains in Xinjiang from 1961 to 2016. According to the results of previous studies on climatic suitability regionalization of wine grape planting in this region,the characteristics of rainfall and its influence on ripening stage of wine grape in different suitable planting regions were analyzed.The results showed that the spatial distribution of the number of rainfall days,rainfall,consecutive rainy weather,rainfall intensity,and the number of rainfall days of a large number of days during the ripening period of wine grapes on the northern slope of Tianshan Mountains all showed the characteristics of increasing with altitude.In the past 56 years of wine grape ripening stage in the study region,except for the extremely significant decrease in rainfall days with a tendency at rate of-1.16 d/10 a（P≤0.001）,and a significant increase in the number of rainfall days of a large amount with heavy rainfall with a tendency at the rate of 0.07 d/10 a（P≤0.05）,The change trend of other rainfall climatic factors was not significant. In the most suitable,suitable and sub-suitable for wine grape growing areas in this region,the rainfall is less than 90 mm,the number of rainy days is less than 2 days,the number of consecutive rainy days is less than once,and the number of consecutive rainy days is less than 40 mm during the grape ripening period,there are less than 90 mm of rainfall,less than 25 of rainfall days,less than 2 days of heavy rainfall,less than 1 consecutive rainy weather,less than 40 mm of continuous rainfall during the grape ripening period. It is very beneficial to increase the yield and quality of wine grapes.From August to September,the regions with rainfall is above 90 mm,the number of rainy days is more than over 30 days,the number of heavy rainfall days is more than 2 days,and,the number of consecutive rainy weather is more than once. The regions with continuous rainy rainfall of more than 40 mm from August to September,are all located at the unsuitable for wine grapes at an altitude of more than 1 500 m,and there is basically no impact on wine grapes above 1 500 m above sea level,which is not the suitable areas for wine grapes planting and the unsuitable climate condition has basically no effect on wine grapes.