Different rocks in D uobaoshan area have their respective characteristic spectra, which are very helpful to the explanation of remote sensing data and the search for copper deposits by remote sensing technology. Reflective spectrum characteristics of rocks in the area were studied with thefield spectometer RS- II (or IRIS).The paper points out that the reflectivity (P) of rocks in Duo- baoshan area decreases iu order of Hercynian magmatic rocks, Paleozoic strata, and Hercyriian volcanic rocks. The analysis of the reflective spectrum charac- teristics shows that the reflectivity of Hercynian magmatic rocks is related to their alteration and Cu content. The magmatite alteration related to the oreforming process of the Duobaoshan copper deposit is noted for the characteristic spectrum of 0,70 μm band. The paulopost alteration caused by thermal fluid in mag matic rocks has distinct spectra at I.4μm, 1.9 μm and 2.2μm respectively, The reflectivity of volcanic rocks is directly proportional to their SiO2 and Cu content. The paper holds that 0.76-0.9μm, 1.55-1.95μm and 2.08-2.35μm are better bands in search for volcanic rocks.T he reflectivity of paleozoic strata in the area is inversely proportional to C content and nu tuber of characteristic spectra. The Ca content and C02-3 radicals are directly proportional to number and intensity of characteristic spectra. The authors have discussed the application of reflective spectra of rocks in Duobaoshan, and point out that the study of reflective spectrum features of rocks can be used to select the best band and the best ratio band for proc- essing Landsat image. The present paper has indicated that the stacking of ground spectra is one of the best methods to define the band for processing TM image.