The evolution of Baimaoxiaosha in recent years,changes in trends and their implications are analyzed in terms of riverbed erosion and section changes.Studies suggest that because of runoff and sediment conditions change,ebb and flow passage separating and human disturbance,the overall evolution of Baimaoxiaosha appears that the sandy surface elevation reduces in the upper sand and the tail-part lifts,and the lower sand is washed out.It is expected that Baimaoxiaosha would be in a natural state of change,but the change will gradually slow down.After washout of the lower sand,the best chance for regulations lost.It is suggested to strengthen observation to analyze the impact on the river regime and water engineering nearby.