The invention relates to the technical field of wireless communication, in particular to an iterative adaptive channel denoising method and an iterative adaptive channel denoising device. The method comprises the following steps: S1, performing inverse fast Fourier transform on channel frequency response to obtain channel impulse response; S2, calculating to obtain a first noise detection threshold; S3, calculating to obtain a first signal-to-noise ratio; S4, calculating to obtain a second noise detection threshold; S5, performing noise and signal separation judgment on all the signals according to a second noise detection threshold; S6, reserving points around each path according to the length of the small path window, and reserving points around the main path according to the length of the main path window; and S7, transforming the denoised channel impulse response to a frequency domain by using discrete Fourier transform and sending the denoised channel impulse response to a signalestimation module. According to the invention, denoising processing is carried out on the channel by using different denoising thresholds according to different signal-to-noise ratios. Therefore, thenoise can be effectively removed and the quality of the received signal is greatly improved.