Based on the temperature data from 29 weather stations between 1960 and 2007 in Guanzhong region, and use methods of climate tendency rate,linear regressive analysis,anomaly analysis,the climate trend analysis, temperature anomaly analysis, wavelet analysis, Kriging interpolation and so on, air temperature change in recent 48 years were analyzed in this paper. The results show that, the air temperature of Guanzhong region fluctuates in the overall upward trend in recent 48 years, and the rate of which is higher than the level of global. There are 17 years that the temperature is abnormal or extreme in the past 48 years ; The probability of anomalies is relatively high. There are obvious 15 - 17 a and 25 -27 a oscillation periods of annual air temperature. The temperature is the highest in the midland region and it grows the fastest in the east region of Guanzhong,but it is the lowest and grows the slowest in the west region.