In view of the characteristics and main problems in the operation of the hydraulic ship lift，a scientific work plan，and strict quality control measures are formulated to complete the first overhaul of the Jinghong hydraulic ship lift. While carrying out the routine maintenance of metal structures，electromechanical devices，and electrical equipment，we focus on overhauling the unique hydraulic drive system of the hydrodynamic ship lift and propose a safer and more scientific way of locking and unlocking the ship chamber. The handling method of synchronous shaft torque exceeding standard is mastered，and the problem of operation stopping due to the torque’s exceeding standard is solved. Through the first overhaul，the overall technical state of the equipment and facilities is improved greatly，and rich experience has been accumulated，which has laid the foundation for the compilation of the maintenance code for the hydraulic ship lift.