Abstract: In order to explore the effect of vegetation on the hydraulic characteristics of naturally curved rivers, this paper designs two layout forms of uniform and cluster to simulate artificial regular planting and natural cluster vegetation groups respectively. Through continuous bending flume experiment, the paper comparatively analyzes the influence of different layouts on flow field, hydrodynamic axis and turbulent kinetic energy distribution. The results show that:（1）There are obvious velocity zones in the flow field of the continuous curved channel : the high velocity zone is close to the convex bank, and the low velocity zone is distributed near the concave bank. Compared with the surface flow, the distribution range of the high velocity zone of the bottom flow is expanded, and the low velocity zone is reduced. The distribution range of high velocity area increases and that of low velocity area decreases greatly after vegetation distribution, and the influence of cluster layout is obviously greater than that of uniform layout.（2）The hydrodynamic axis of the continuous curved channel flow deviates from the normal position, which shows the dynamic change process of closing to the convex bank firstly and then leaving the convex bank. Vegetation layout greatly delays the process, and the delay degree of cluster layout is greater than that of uniform layout.（3）The turbulent kinetic energy distribution along the continuous curved channel flow is uneven, and the maximum value appears near the top of the bend. From the numerical changes of turbulent kinetic energy, it can be seen that the vegetation layout makes the turbulent kinetic energy of the water flow generally increase, and the influence of cluster layout is greater than that of uniform layout.