Abstract: In order to study the variation of water cycle of Songshan Nature Reserve, 41 years observational data in Songshan meteorological station from 1971 to 2011, which includes rainfall, temperature, sunshine hours and evaporation were used. The change characteristics of monthly, seasonal, yearly evaporation and rainfall and relationships between evaporation and other meteorological elements were studied. The results indicated that: the evaporation mostly occurred from April to June and the rainfall mostly occurred from July to August. The evaporation trend and the rainfall trend decreased from 1971 to 2011 with an average rate of 27 mm per 10 years and 5 mm per 10 years, respectively. The evaporation was obviously more than the rainfall under monthly, seasonal and yearly distribution. Sunshine hours and temperature were very significantly correlated with monthly evaporation and seasonal evaporation, with the order of temperature>sunshine hours. Yearly evaporation had no significant influence with sunshine hours and temperature.