In order to achieve the control target of total water consumption, the water consumption intensity index system of different industries and regions in Xiong'an New Area is constructed by analogy and reference method from the aspects of controlling water consumption intensity and improving water resource utilization efficiency. In view of the uncertainty of the water consumption intensity index, the total water demand of Xiong'an New Area in different periods is predicted by using the stochastic simulation method, and the statistical analysis is carried out. The results show that the minimum water demand in the construction period, completion period and take-off period of the new area is within 750 million m³,the average water demand is 800 million m³, and the maximum water demand is 900 million m³. It is suggested that on the basis of establishing an advanced water intensity index system, the implementation and supervision of water intensity indicators should be strictly to ensure that the water intensity indexes are effective, comprehensively promote advanced water-saving technologies in life, industry and agriculture, strengthen the utilization of unconventional water resources, and promote the efficient recycling of water resources.