To address the current issue where the highest peak water flow rate of ship lock water conveyance systems domestically and internationally can only support nearly 600 m3/s(based on the Madao Ship Lock of the Pinglu Canal)for safe passage of ships,this study explores how to further improve the peak flow rate of the water conveyance system to about 1，100 m3/s(based on the Xiangjiaba Ship lock of the Jinsha River).Combining relevant German experience,a pressure chamber water conveyance system is adopted.Compared with the four-section cover plate energy dissipation type of the single-sided inlet longitudinal branch corridor of the Madao Ship Lock of the Pinglu Canal,the pressure chamber water conveyance system overcomes the disadvantages of the constant-inertia water conveyance system,such as “complex layout,significant head losses along the way and locally,and compromised conveyance efficiency.”Numerical simulations are used for verification.Preliminary results indicate that the water conveyance system can meet the requirements for safe passage of ships.With the continuous promotion of China’s Western Development Strategy,the water head difference of navigational structures in mountainous areas will exceed 60 m,and even surpass 100 m.The pressure chamber water conveyance system will achieve the goal of smooth passage of ships through dams.Further validation through physical model tests is planned for the next phase.