Abstract: Latent heat flux and sensible heat flux in winter wheat field were measured by uNng the eddy covariance technique，and the effect of energy balance components and wind speed to canopy temperature and the canopy-alr temperature difference were analyzed also．The results show that the net radiation flux is the main energy factor infecting canopy temperature，and there is a remarkable linear correlation between them(a=0.01)．The effects of latent heat flux．sensible heat flux，and ground heat flux on canopy temperature are related to weather condition．Wind speed remarkably infects the canopy-air temperature difference，and there is a negative correlativity between them．