The invention relates to a vegetation-form riverside fixing toe component used for micro-pollution river enhanced nitrogen removal and a preparation method thereof, and can effectively solves the problems that a carbon-nitrogen ration of a river water body is relatively low, a microbial denitrification carbon source is insufficient, and TN is difficult to remove. According to the technical schemeadopted by the invention, the component comprises an ecological concrete component main body, matrix filler and a soil filling layer, wherein the matrix filler is filled inside the ecological concretecomponent main body; and the soil filling layer is filled in a matrix filler gap. The vegetation-form riverside fixing toe component prepared by the preparation method can effectively solve the problems that the carbon-nitrogen ratio of the river water body is relatively low, microbial denitrification carbon source is insufficient, and TN is difficult to remove, can improve self-purifying abilityof water body, is beneficial for plant growth in a riverside region, brings cooperative purifying effect of microorganism and plant into play, has a landscape effect, is innovation on an ecological purifying device, and has a very good application prospect.