Abstract: Regarding applications of the large-scale aeroacoustic wind tunnel in scientific research, this paper introduces the usage of FL-17, a 5.5 m × 4 m aeroacoustic wind tunnel, in a Sino-Russia joint collaboration research project on civil aircraft landing gear noise and its control. First of all, the construction history and specifications of FL-17 wind tunnel are introduced. Then, based on the large-scale wind tunnel test of landing gear aerodynamic noise in Sino-Russia joint research, the state-of-the-art of the landing gear noise investigation was introduced, as well as the research contents and achievements of the landing gear noise and its control carried out in FL-17 wind tunnel. The discussions involve large-scale experimental studies, database of full-scale landing gear experiment, numerical simulations, prediction models, noise control using truncated cylinders and air curtains, etc. As last, some experiences and suggestions on the usage of large-scale aeroacoustic wind tunnel were provided.