Abstract: In order to distinguish evaporation and crop transpiration, the dual crop coefficient model, SIMDual Kc, was calibrated and verified based on 3-year data measured from an experimental field of winter-wheat in the North China Plain. Result show that simulated values of evapotranspiration and soil water content fit well with their respective observed data. Simulated evaporation show clear periodic variation, closely related to different phase of crop growth. The ratio of evaporation to the actual crop evapotranspiration in the whole growth is 17%-22%. Consequently, this model is suitable to be used in North China Plain.