Abstract: On the basis of the data collected from observations in 6 years,according to the principle of turbulent despersion, the basic characteristics of evapotranspiration in Chinese fir plantation was studied. Results showed that the annual evapotranspiration is 875.45mm, which takes 82.2% of the precipitation. The annual crown-evapotranspiration is 89.3% of the total evapotranspiration (781.77mm), the ground evaporation is 10.7% of total evapotranspiration (93.68mm). The total evapotranspiration increased by 1.2% compared with the results from water balance method. We also analyzed and discussed the application of turbulent flow method and its parameter estimetion.