First, mesoporous molecular sieves MCM-41 with channel rules were synthesized in a hydrochloric acid solution. And then, functionalized MCM-41materials have been obtained by a incipient wetness impregnation method using four different organic amines, which were monoethanolamine(MEA), diethanolamine(DEA), diethylene triamine(DETA) and tetraethylenepentamine(TEPA). The samples were characterized by powder X-ray diffraction(XRD) and infrared spectroscopy (FT-IR). According to the XRD and FT-IR results, these samples were all loaded with organic amines successfully. The CO2 static saturated adsorption capacity of these materials were found to depend on the kinds and amounts of the organic compound loaded. The strongest adsorption capacity of the four organic amines were all in a loading nearly 60%. Among them, the loading of TEPA has the best adsorption performance. These amine-loaded mesoporous molecular sieves MCM-41 could have great potential application to adsorb CO2 in natural gas purification process.