The invention discloses an ecological bag reinforced earth-retaining wall. The reinforced earth-retaining wall consists of multiple layers of ecological bags, wherein each ecological bag contains original soil of a site where the reinforced earth-retaining wall is to be placed or foreign soil and also contains one or more components which are added into the original soil or the foreign soil to beused to improve the soil quality; and the one or more components added into the original soil or the foreign soil are determined according to the PH value, the organic matter and the ammonia-nitrogencontent of the original soil or the foreign soil as well as one or more components in the soil separates. The ecological bag reinforced earth-retaining wall provided by the invention can avoid displacement, deformation and falling off and can be applied to ionic-type rare-earth mining areas in southern China, ecological buffer zones, ecological grassed swales, earth-retaining walls for wetlands, ecological rehabilitation projects for drainage basin revetments, road side slope projects, ecological rehabilitation projects for mines, rehabilitation technologies for black and odorous water bodiesand other fields. Moreover, the ecological bags of the ecological bag reinforced earth-retaining wall are filled with the soil and the different components added into the soil, and materials adopted for the different components are economical, efficient and green, so that migration of harmful elements in contaminated soil at the site where the reinforced earth-retaining wall is to be placed can beeffectively prevented and the quality of the contaminated soil can be improved.