Abstract: Ecological flow is an important indicator for maintaining the ecological function of rivers and lakes and controlling the development intensity of water resources,and an important foundation for coordinating the life,production and ecological water use,and optimizing the allocation of water resources.Taking the main stream of the Hanjiang River as the object,the current situation and problems of ecological flow protection and management in Hanjiang River were analyzed.Combined with the cascade development in the Hanjiang River Basin,the conventional operation and emergency operation measures for the ecological flow guarantee of the main stream of the Hanjiang River were proposed.Aiming at the demand of ecological protection target,this paper put forward some measures for controlling water bloom and sensitive ecological water demand.With strong supervision as the goal,establishing monitoring and early-warning mechanism,strengthening ecological flow supervision and assessment,enhancing scientific and technological support capacity were put forward.The research results can provide technical support for ecological flow management,and are of great importance for improving ecology and environment in the middle and lower reaches of the Hanjiang River.