The surface evaporation is the main part of the water loss of the Three Gorges Reservoir, and it is the basic factor to study the waterbalance of the reservoir. This paper collected the data of surface evaporation from 7 meteorological bureaus around the Three Gorges Reservoir,and analyzed the spatial-temporal distribution and surface evaporation of water bodies evaporation capacity in the Three Gorges Reservoir. Theresults show that the evapotranspiration at the various stations are consistent with each other; there is a significant decrease trend in fluctuates ofannual surface evaporation and change of annual evaporation. The annual variation is that the evapotranspiration of the upper reaches of thereservoir is small and the change gradually increases from the upstream to downstream while the surface evaporation is increasing from theupstream to downstream.