It is available to use the characteristic of hyperspectral image,which has rich spectral information,to extract the mineral information in a mixed spectrum.The paper,based on the traditional studies of mixed pixel linear unmixing,puts forward a new mixed hyperspectral unmixing model to obtain the feature endmembers in the mixed spectrum by creating the spectral curve matrix (SCM); all endmembers’ matrix coefficients (the abundance values) of a hyperspectral image and their abundance images are also computed after the mixed spectra were unmixed according to the created SCM; at last,a good unmixing accuracy displayed the favorable effect of the new unmixing model by the accuracy evaluation.