For parity inflection point Gaussian decomposition method in full waveform data processing in the problem of insufficient accuracy, this paper puts forward a full waveform data processing algorithm based on peak effective correction. This method is first used in the process of data preprocessing the data block to estimate the mean and variance of noise, and then used in different signal segment and the matching filter width of Gaussian filtering. Then combined with the noise threshold and filtering after wave peak to extract the effective information. Finally, modify the Gaussian component parameters according to the peak information. Taking Beijing urban area as the experimental research area, the decomposition accuracy is compared with the results of other decomposition algorithms. The results show that the root mean square error between the height estimated by this algorithm and the actual measured value is 1.02, which is better than the results calculated by the even-odd inflection point Gaussian decomposition method and the Gaussian decomposition product GLA14.