The precipitation is less and the climate is arid in hotan oasis of Xinjiang.The evapotranspiration is the main way of water consumption in the region.The reasonable estimation of evapotranspiration can provide the basis for the reasonable allocation of water resources in oasis area. Based on the meteorological data from 2006 to 2014 and hydrology data from 2006 to 2014, the paper used CRAE model and water balance method to calculate the actual evapotranspiration in Hetian oasis, and verified the applicability of CRAE model in this area. The results show that the simulation result of flat water years is better than that of mean annual actual evapotranspiration,the error results of dry year and wet year is larger;the result of evaporation capacity ETp calculated by the model is more reasonable than that of P-M equation and Hargreaves formula;the paper used water balance coefficient, total amount balance coefficient and correlation coefficient to evaluate the results of calculation.The error is in a reasonable range. The CRAE model has good application effect in the area of oasis, which can be used to estimate the actual evapotranspiration in the area.