In this project，the soil moisture，water consumption，crop water requirement and irrigation water quantity of autumn soya were monitored by setting sprinkler irrigation，furrow irrigation and non-irrigation in the dryland experimental area.The effects of different irrigation methods，the change law of soil moisture in autumn soya during the whole growing period，the law of water consumption of autumn soybean in different months and different growing periods was obtained by the formula of water balance，and the relationship between water consumption and yield was put forward.Through three years of monitoring data，proposed different levels of irrigation in different irrigation quotas.