Abstract: According to the experimental data of controlling water for winter wheat field in Taian, Shandong Province during 1983—1984 and 1984—1985, the relationships between the water consumption for wheat field and winter wheat growth, physiological condition and yield of winter wheat have been analysed. Optimum water index and optimum yield from the jointing stage to mature stage have been obtained. In this paper, We have also discussed water usage effect.