According to the average temperature and average data of pricipition in years of 1960-2007 in city of Xian yang,wei nan,Bao ji,Tong chuang and the area of weibei ,and long period of climate data about apple growth in drought plateau in wei bei area.We analized the temperature and average precipitation data in the late period of the apple grouth that embryonic growth period(februery-Match),flowering period(April),fruit expansion(May-August),the fruil shading period(September), fruit maturity (October)in the past 48 years with the excel,The result of stady showed that the trend of climate change in drought Plateau in weibei shaan xi was basically in accordence with the national trend.Generally,the tempreture in weibei was soaring up,but the rainfall declining in a row in the past 48 years. This trend of climate change made the impact of the average temperature and rainfall on Apple's growing season was different.(1)The lack of water for embryonic low-temperature made the period of the lifting of dormant fruit trees, leaf, flower bud sprout and flowering different. (2)Temperature change have the greatest impact on the flowering period.(3)The temperature and rainfall in the period of fruit enlargement have directly impact on the number of apple.(4)In the period of fruit coloring,low tempreture,good weather,little rainfall is good for it.(5)In the period of fruit maturity, high tempreture and litlle rainfall is good for harvesting the fruits of maturity.