In the wavelet threshold denoising

it is important to choose the threshold.In order to overcome the shortcomings of traditional fixed thresholds on each scale

a new wavelet threshold denoising method is proposed in this paper.The improved threshold can be changed with the number of decomposed layers

as it is shown flexibility in practice situation.In this paper

Signal Noise Ratio（SNR）and Mean Square Error（MSE）are used as the parameters to evaluate the denoising performance.Compared with the traditional threshold

the simulation results show that the denoising effect based on the improved wavelet threshold denoising method is better than the traditional wavelet denoising based on sqtwolog

rigrsure

heursure and minimaxi wavelet threshold.The improved wavelet threshold denoising method has a high practical value.