The utility model discloses an ecological slope protection structure is recycled to slag, include: domatic surrounding layer, it covers in the surface of side slope, netted fragment of brick layer, itsets up in the surface of domatic surrounding layer, and this netted fragment of brick layer includes a plurality of brick units that are listed as, and every brick unit that is listed as is providedwith a plurality of fragment of brick, and every fragment of brick is the cavity ring -type, drainage system, it includes escape canal and catch water drain, the escape canal sets up in netted fragment of brick in situ, the catch water drain including set up in the first catch water drain of the upper end of side slope with set up in the second catch water drain of the lower extreme of side slope, the escape canal communicates with each other with first catch water drain and second catch water drain, and plant species plants the layer, and it is filled in the space on netted fragment of bricklayer. The utility model discloses a set up domatic surrounding layer and netted fragment of brick layer to can fix the soil of side slope, the rethread sets up plant species and plants the layer inorder planting the plant, thereby it is native to carry out waterproof guarantors to the side slope, the fragment of brick is the slag fragment of brick, and industrial waste recycles sparingly resource.