The Yanzishi-Jiawanen rapids locate at the dehydration section of the Longtan junction and the Pingban junction. Under the current condition the Yanzishi rapids are shallow in low water and steep in normal water level period,and Jiawanen rapids are steep in low water,which cannot meet the requirements of ship navigation. Based on the genetic analysis of rapids and characteristics of the navigation obstruction,the management idea of the rapids is determined.Through the study of multi-model optimization of physical model and ship model,a recommendation scheme is put forward：the scheme of the Yanzishi rapids is that the main and the branches are excavated simultaneously to adjust the distributary channel,smooth route and widen the channel.And the scheme of the Jiawanen rapids is that rocks in channel are exploded,which can expand bayonet section and broaden tranquil flow channel.The research result may serve as reference for the regulation of similar difficult rapids in mountain rivers.