在小波多分辨分析的基础上，在各个尺度上分别用协方差矩阵法计算极化参数，给出在不同的尺度上选取相应的时窗长度的方法，对协方差矩阵法不能计算的各个尺度位移的开始和结束处用瞬时法计算极化参数。这种方法有效地解决了协方差矩阵法时窗长度的选取和参数计算时存在的边界问题以及瞬时极化分析法对瞬时干扰的敏感问题． On the basis of wavelet multiresolution analysis, the covariance matrix method is used to calculate the polarization parameters at each scale, and the method of choosing the corresponding time-window length at different scales is given. The covariance matrix method can not calculate each scale The polarimetric parameters are calculated instantaneously at the beginning and end of the displacement. This method effectively solves the problem of time window length selection and parameter boundary calculation, as well as the sensitivity of instantaneous polarization analysis to instantaneous interference in covariance matrix method.