The arrangement of miter gate library of ship lock relates closely to the local flow structure and smoothness of water exchange during opening and closing of the miter gate. It directly affects the values of opening and closing force and the hydrodynamic resisting torque of the miter gate，and it’s very important for the high-head and large-scale lock. This paper analyzes the characteristics of local flow structure during opening and closing of the miter gate by the mathematical model，demonstrates the influences of boundary conditions on the hydrodynamic resisting torque，and puts forward the arrangement technology of the miter gate library of the high-head and large-scale ship lock，gives a scientific and reasonable shape of miter gate library and the characteristic sizes，which can significantly reduce the initial and final peak value of the hydrodynamic resisting torque，so as to solve the design problems of the miter gate and hoisting equipment of the high-head and large-scale ship lock. It is beneficial for the miter gate to operate safely and reliably.