Abstract: In order to cope with climate change, explore the arid development law of Huanxian, draw on the advantages and avoid disadvantages to rationally develop and utilize the climate resources. The author used the 55 years temperature and precipitation data from 1957 to 2012 in Huanxian, Gansu Province, calculated the maximum temperature, minimum temperature and average rainfall, precipitation days weather trend rate by using the least squares method since the average temperature 1957 years. The results showed that: Huanxian climate warming was a fact, the temperature trend and the trend of temperature over the same period after the mid-1980s were basically the same, the warming rate of 0.385℃/10 a, the average maximum temperature was warming rates up to 0.597℃/10 a, was significantly higher than the national warming rate, by YAMAMOTO, cumulative distance equal way to test was to climate catastrophe point 1987 year, 1987-2012 compared with 1957-1986, the average temperature increased by 1.2℃, winter increased 1.3℃; Huanxian had a decreasing trend in precipitation tendency was -14.013 mm/10 a, which in spring, summer and autumn precipitation radiate a decreasing trend, the most significant decreased in autumn; climate warming, extreme weather events after drought reduced precipitation, increased significantly large floods of 1987 warming after the drought of increased probability of 5%, 3% increased in the probability of large floods.