As the endpoint of the Hangzhou section of the second channel of the Beijing-Hangzhou Grand Canal,the Babao ship lock is a thousand ton level ship lock built simultaneously on both tracks in strong tidal bore river sections in China,which plays an important role in both navigation and tide blocking.The water flow conditions in the Qiantang River tidal bore section where the ship lock is located are complex,and the tidal bore load has a significant impact on the operation of the gate.Therefore,it is crucial to choose a reasonable gate type of ship lock.A comprehensive and systematic comparative study is conducted on various common gate types (such as herringbone gate,flat steel gate,triangular gate,etc) from multiple dimensions,including navigation smoothness,tide blocking reliability,and structural stability,on the basis of the actual operating conditions of Babao ship lock.The results show that the combination design of herringbone gates and flat steel gates has outstanding advantages in navigation smoothness and tide blocking reliability,and can better adapt to the navigation and tide blocking needs of the Babao ship lock in strong tidal environments,providing technical guarantees for the safe operation of the Babao ship lock.