The invention belongs to a liquor quality identification method, and relates to a method for liquor quality identification through infrared spectrum revision. The prior art has the defects that error of an appraisal result is large, test time is long and the like. The method for liquor quality identification through infrared spectrum revision includes the following steps: respectively testing the infrared spectra of no sample and liquor samples, saving test data after each sample is tested, obtaining a standard spectrum through average of each sample spectrum, conducting nonlinear mapping to the standard spectrum, viewing the sample spectra as linear combination of the nonlinear mapping, obtaining the weight coefficient of the linear combination through optimization algorithm, signifying the spectra with the weight coefficient and the nonlinear mapping to obtaining a revised spectrum, establishing a liquor quality identifying module through partial least squares discriminant analysis, applying the liquor quality identifying module into identification for unknown samples, and outputting identification results. The method for liquor quality identification through infrared spectrum revision has the advantages that accuracy of quantitative analysis is increased, classification accuracy is increased, and noise error in signals is eliminated.