Based on daily average air temperature and daily precipitation data from 1953 to 2012 in the Madoi station,and preliminary dispose with Pivot table in Microsoft Excel,the patterns and characteristics of climate changes in the sources areas of the Yellow River were studied with the methods of the linear regression method, cumulative anomaly method,Mann-Kendall test and Morlet wavelet analysis method. The linear regression method was used to study the variation trends of the mean annual air temperatureMAAT)and annual precipitation on annual and decadal scales. The cumulative anomaly method and Mann-Kendall test were used to test trends and abrupt jumps of the MAAT and annual precipitation. The Morlet wavelet analysis was used to detect the change interval of the MAAT and precipitation. The results demonstrated that the climate in the Madoi station showed a significant warming trend,the MAAT varied between-2. 07 and-5. 50 and averaged at-3. 67℃, the annual precipitation varied between 184. 0 mm and 485. 6 mm and averaged at 321. 5 mm,and the climate trends were 0. 28℃·10a ~(-1)and 10. 2mm·10a ~(-1),respectively. The climate trends were 0. 148℃·10a ~(-1),0. 212℃·10a ~(-1),0. 279℃·10a ~(-1),0. 501℃·10a ~(-1)for the spring,summer,autumn and winter respectively. The climate were warmer since 1989,the abrupt change in the MAAT occurred in 1998,and the significant increasing of the MAAT started from 2010. Trends of precipitation in the spring and summer were 3. 883mm· 10a ~(-1)and 4. 506mm·10a ~(-1),respectively,and contributed greatly to the annual precipitation. The climate change interval analysis revealed that the MAAT fluctuated significantly with the intervals of 25,14,11 and 6 years,and the annual precipitation fluctuated with the intervals of 45,30,12 and 5 years,respectively. The primary intervals for the MAAT and annual precipitation were 12 and 30 years,respectively.