Based on meteorological data,the characteristics of climate change (variation,mutation characteristics and cycle characteristics) in the maize growth period of Tacheng city were analyzed by using trend analysis method,Mann Kendall test,and wavelet analysis method.The results showed that the average temperature experienced an increasing trend,while the wind speed showed a decrease.The average maximum temperature,average temperature,accumulated temperature revealed abrupt increasing trend in 1996,1995,respectively.However,the average minimum temperature,sunshine hours,potential evapotranspiration had no obvious mutation,while the relative humidity and wind speed revealed abrupt decreased in 1997,2008.The average maximum temperature and accumulated temperature had two periodic scale characteristics,i.e.,30a long cycle and 15a small cycle.Duration of sunshine hours,potential evapotranspiration,relative humidity and wind speed in the growth period of maize had the periodic of 30a and 16a.