应用W-M函数建立了分形粗糙表面轮廓，用小波变换对其进行分解，考察了小波变换方法对原轮廓曲线的还原情况(The fractal rough surface profile is established by W-M function, and the wavelet transform is used to decompose it. The reduction of the original contour curve is investigated by the wavelet transform method.)