The variation characteristics of the pan evaporation and its climatic influencing factors in Shijiazhuang city in the last37 years are analyzed in this study by using themethods of cumulative anomaly and linear trendency estimation and complete correlation coefficient. The results show that the annualpan evaporation presented obviously decreasing trend, andmost significantly decrease occurred in spring, then in summer and autumn. The pan evaporation in a year and differentseasons has a positive correlationwith sunshine duration, average temperature daily range, averagewind speed and average land surface temperature, buta negative correlationwith average humidity. Themajor reason ofpan evaporation decrease in Shijiazhuang city is the decrease of sunshine duration and average temperature daily range, and the second is the decrease of averagewind speed and average land surface temperature.