The water transfer project from the Yangtze River to the Hanjiang river is a large water transfer project from Jingjiang reach of the Yangtze River to Xinglong reach of the Hanjiang river to supply water for the lower reach of the Hanjiang river considering the reduction of water supply due to the first stage midline the project of the South-North water diversion project ,with an annual average carrying capacity of 3.7 billion m3.The water-intaking project will have an influence on the Jingjiang reach in the middle reach of the Yangtze River.Considering the Three Georges project 175 m trial run period (after 2008) as a general hydrological year and according to the design water-intaking volume fo the water transfer project from the Yangtze River to the Hanjiang river,we calculate the change of the flow and water level of the main river channel of the Yangtze River caused by the intake works and analyze the variation of channel condition in the affected reach.