To retrieval the instantaneous phase of the fringe pattern accurately in Fringe Projection Profilometry, the fringe pattern should be denoised. Based on OWT_SURE_LET wavelet denoising method, using stationary wavelet substitute for orthogonal wavelet, using DB8 substitute for Sym8, and using a shrinkage function with six parameters substitute for that with four parameters, an improved wavelet de-noising algorithm is proposed. Compared with other de-noising methods, the new method is very fast and robust. Experiments show that this new method is effective in the sense of peak signal-to-noise ratio (PSNR) and root square mean error (RSME) of the instantaneous phase of fringe pattern, no matter what types of the fringe pattern or the carrier frequency in the fringe pattern.