Abstract: The temperature and sunshine and precipitation and wind and wheat yield of all counties in Jiangsu province are analyzed.It is shown that climatic variability annual mean temperature is 0.16～0.45℃/10 years,and the average is 0.28℃/10 years,annual total sunshine is-155.72～38.89hr/10 years,and the average is-65.37hr/10 years,annual total precipitation is-28.00～37.09mm/10 years,and the average is 5.77mm/10 years,annual mean wind speed is-0.57～-0.03 m/s per 10 years,and the average is-0.30 m/s per 10 years,rising rate of wheat is-3.00～0.98% per 10 years,and the average is-1.23% per 10 years.Whole provincial climate changes warmer and warmer,sunshine and precipitation and wheat yield increase in some area or decrease in other area,wind speed decreases.The climate and wheat yield show a regional pattern,the diversity of Sunan and Suzhong and Subei is explicit.The climatic variability of rising rate of wheat yield is not linearity relation with temperature and sunshine and precipitation sand wind speed.

Key words: Climatic change, Wheat yield, Effect