Abstract: Based on the data of the flux observation system of the Shouxian National Climate Observatory from November 2007 to May 2008, an analysis is made of the turbulent characteristics in the wheat field ecosystem over the Huaihe River basin. Diurnal variation of the net radiation is the greatest at the maturing stage. When the temperature reached the highest at noon, heat flux reaches maximum, and heat flux shows negative at night. The peak time of latent heat flux delays about one hour than the peak time of net radiation. From jointing stage, the average diurnal variation of latent heat flux is all higher than 50.0 . the average diurnal variation of soil heat flux is all positive except 3-leaf and tillering stage. H/Rn and LE/Rn have characteristics of significant seasonal variations, and their change direction is opposite.