To suppress great galloping under the influence of the wind-break wall wake for the catenary positive feeder of the Lanzhou-Urumqi high-speed railway in the strong wind area， based on the aerodynamic theory， the geometric model of the catenary positive feeder after installing the aerodynamic damping sheet is established. The fluid-solid two-way coupling solution of the galloping response of the positive feeder is realized by combining the user-defined program （UDF） and the dynamic mesh technology. The results show that the galloping amplitude of the positive feeder is the smallest when the installation angle of the fixed aerodynamic damping sheet is 140°. The suspended aerodynamic damping sheet is suspended vertically downward and has a galloping suppression effect after installation. When the length of the damping sheet structure of different suspension modes is 0.75D， the galloping amplitude of the positive feeder reaches the minimum， and the aerodynamic damping sheet has the best galloping suppression effect. The aerodynamic damping sheet also has a certain weight effect to offset part of the vertical wind load， which is more suitable for the operating environment of the high wind section of the catenary of Lanzhou-Urumqi high-speed railway， and it is recommended to use the metal material aerodynamic damping sheet. After installing the aerodynamic damping sheet， the channel of the air flow through the wire is limited， resulting in pressure difference and further leading to slowing down the air flow rate， enhancing the aerodynamic resistance， consuming the energy brought by the vibration of the wire， and reducing the amplitude and frequency of the vibration.