Based on the real-measured data about Zhijiang-Jiangkou River waterway before and after imnplementation of the first phase regulation engineering,this paper analyzes the variation of channel condition and flow condition after the implemenmtation of the first phase regulation engineering.The result shows that after implementation of the regulation project,the key bars in the reach keep stable,the channel condition is improved,and the trend of rapid dropping of the water stage in the rivwer reach is controlled to a certain degree.The engineering effect is remarkable and the regulation engineering has reached the design standard.