Abstract: Taking an aircrafts nose landing gear as a test model, the noise generation mechanisms, noise characteristics and influence factors are investigated in the wind tunnel, where the noise frequency spectra are measured. The influence of torque link is analyzed by modifying its position. The test results show that the noise of the assembly of buffer pillar and torque link including bluff body noise and interaction noise. The main noise source has a directivity of a form of the dipole. The overall sound pressure level (OASPL) is lower for the case with the torque link downstream to the buffer pillar than that of the case with an upstream torque link. The finding can be helpful for the optimization of a landing gear design from the perspective of noise.