By using a horizontal resolution of 50 km x 50 km regional climate model RegCM4, single nested BCC CSM1.1 global climate system model results. With the eastern Northwest China to North China as the study area, estimated the characterization of temperature and precipitation and drought trends. The results showed that: RegCM4 had a certain ability to simulate temperature and precipitation in the study area, and it can simulate their spatial distribution and time trends, but because the model had some systematic error, so some regional simulation results were slightly higher than the actual number; 2041 -2050 compared to 2006 -2010, in study area of temperature would rise 1.0 ℃ in RCP4.5 scenario, and temperature would rise 1.4 ℃ in RCP8.5 scenarios. Under the two scenarios, in study area of precipitation showed fluctuations and they were not obviously consistent trend, but they were involved in the precipitation decreased channel from 2014; Generally speaking, Under the two scenarios, they might be more obvious drought with the study area in 2041 -2050. In RCP4.5 scenario, the study area's drought trend would be aggravated in summer and autumn with the 2041 -2050, and the SPI values were generally low and might be appear to drought in autumn from 2042, In RCP8.5 scenario, the study area's drought had an overall increasing trend in summer, and the study area's drought showed the decreasing trend in autumn, but then turned into drier period from 2045.