Abstract: Aiming at the history and present situation of the lower Yellow River channel,from the view of physical geography,human geography,river dynamic and the harmonious sustainable development of people and river,this paper researches benefit-raising problems of the lower Yellow River channel.Taking the city after Integration of Zhengzhou and Kaifeng as an example,this paper also establishes the conceptual mathematical model to analyze and prove the key technique of flood control and disaster reduction of the lower Yellow River area.