According to the theory of the second generation wavelet transform, the improved algorithm is proposed and the optimum-interval interpolation estimation is used to design the predictor. To verify the effectivity of the improved algorithm, it is applied in the noise reduction. 在阐述第2代小波变换基本原理及特点的基础上,将最优插值估计引入到预测器设计中,提出了第2代小波变换算法的改进算法。