Abstract: Agricultural traits of root and canopy，and water use efficiency of 10 wheat varieties were analyzed under different irrigations．The results show that different wheat varieties under the same water deficit are almost alike But there are some differences among 10 wheat varieties．The sufficient irrigation can increase the biomass of winter wheat but decrease the water use efficiency．Two times of irrigation can get the highest water use efficiency and a very high yield．The experiments also show that“6365”is better for water use efficiency．and is the best for drought resistance capacity and yield potentia1．