To evaluate the surface of glass elements that achieved by single point diamond turning (SPDT) operation, the wavelet analysis method is employed to analyze surface and surface ripple.In this work, the wavelet analysis method is introduced to decompose and reconstruct the sampled surface profile signals with the wavelet by using bior2.8 software. The surface is extracted effectively and the signals of the middle-frequency is separated from the surface. The characteristic frequency is 0.18 mm.1. The wavelet analysis method avoids the problem of amplitude distortion which exists in the spectral-filtering method. Moreover, the wavelet multiscale analysis method is applied to analyze the details and frequency performance of the wavefront.