Abstract: Based on the meteorological data of 9 stations of Shijiazhuang in 1964-2012, using trend analysis, Mann-Kendall test, EOF and the formula of Penman-Monteith, the monthly and annual temporal and spatial distribution characteristics of reference crop evapotranspiration of Shijiazhuang were studied. The results showed that: the trends of reference crop evapotranspiration were on the rise in both February and March, but the trends were not significant. The trends of reference crop evapotranspiration in the other months declined, the maximum rate of decline was in June, the minimum rate of decline was in April. In mutation test, May, June, August, October, November and the annual reference crop evapotranspiration change mutated and declined significantly, the times of mutation all appeared after 1983. The reference crop evapotranspiration decreased with the increase of latitude, the trend of spatial variation showed the consistency, and in the late of 1980s, the trend of reference crop evapotranspiration decreased faster in the southwest of the area of Shijiazhuang to Zhaoxian. The study can offer reference for water-saving agriculture development and countermeasures to the contradiction between supply and demand of groundwater.