Abstract: A method of two-dimensional equivalent reconstruction for the measured road surface spectrum was proposed in order to provide more accurate road incentives for automotive test and dynamic simulation. Combined with the data characteristics of a level 3 highway test surface, some methods including the empirical mode decomposition method were used to remove the trend items, and the EMD wavelet threshold method for filtering and denoising. The two-dimensional AR reconstruction method for the measured road surface was studied systematically. Then, the reconstruction precision was analyzed by the correlation coefficient method. The results showed that the variance of power spectrum after denoising by the empirical mode decomposition wavelet hard threshold based on the fixed threshold criterion was the minimum, and the relevant degree of the reconstructed road spectrum by AR model with the measured one was high. The method can provide a basis for the further application of road spectrum.