The regulation technology of complex rapids in the Yellow River of Ningxia autonomous region which is shallows,rapid,bending and dangerous is researched.Based on the analysis of the rapids’ characteristics,we propose four regulation design schemes which are optimized through comparison by physical model experiments.The results show that the best regulation scheme uses duplex section in the upper segment of dredging to increase the depth and width of the inset segment of rapids,which is conducive to reduce the water surface slope and flow rate.Although it creates an adverse impact on the upper reaches due to the sharply decreased water level,it has the best regulation effect.The navigation condition is improved remarkably after implementation of the project and navigation flow conditions are satisfactory.It may serve as reference for the regulation of similar rapids.