The invention discloses an alteration extraction method for imaging high-spectral boring rock core data, and belongs to the field of high-spectral remote sensing application. The method comprises that a reference whiteboard and a rock core sample to be scanned are placed; the whiteboard and a rock core are scanned via a high spectrum, and original imaging high-spectral data is obtained; the original imaging high-spectral data is preprocessed to obtain imaging high-spectral reflectivity data; the format of the imaging high-spectral reflectivity data is converted to obtain data of a BIP format; the format of the BIP data is further converted to obtain ENVI Spectral Library data; spectral analysis is carried out on the ENVI Spectral Library data via software The Spectral Geologist, and an alteration analysis result is obtained; and format conversion is carried out on the alteration analysis result to obtain an alteration extracted image. The method can be used to extract imaging high-spectral rock core scanning data automatically.