：Unstable flow pattern inside the ship lock is caused by filling and draining the ship lock.In extreme cases,jets can disrupt the free-surface flow field,which poses a serious threat to the safety of the ship at berth and affects the efficiency of ship lock navigation.Influenced by many factors,Mujing ship locks are now facing technical problems such as deterioration of water flow conditions at the entrance and exit of the approach channel,mutual influence of water flow in the approach channel during filling and draining,influence of reciprocating flow,exceeding of navigational water flow conditions in the shared approach channel,and poor navigational conditions for ships.The RNG k-ε turbulent model is adopted to simulate the layout of the water inlet in the water delivery system for ship locks,and hydraulic characteristics and localized hydrographic conditions are studied.Based on the design scheme of water delivery system of Mujing ship locks,the key technical problems of hydraulics during the operation of ship locks are analyzed and discussed in detail,and optimization measures are proposed.The results show that the width of the throat and the order of arrangement significantly affect the flow pattern of the water inlet.The width and spacing of the throat can be changed to effectively improve the water inlet conditions,stabilize the water flow pattern and improve the problem of uneven inlet flow.