The invention provides an ecological high-strength concrete which is prepared from a composite cementing material, an aggregate, a fiber, an aqueous solution doped with an additive and an auxiliary agent by fully stirring and vibration, and the ecological high-strength concrete is characterized in that the composite cementing material is prepared by adding 100-400 parts of waste with gelling activity into 600-900 parts of cement and 100-300 parts of silica fume as reference composite cementing materials, the aggregate is prepared by adding 300-600 parts of a waste aggregate into 300-500 partsof 20 to 40-mesh sand, 100-300 parts of 40 to 70-mesh sand, and 50-100 parts of 325-mesh sand as a reference aggregate, the fiber is prepared by adding 10-30 parts of waste fiber into 30-60 parts of steel fiber as a reference fiber; and the aqueous solution doped with the additive is prepared by adding 50-120 parts of plant wastewater into 12-40 parts of a high-efficiency water reducer mother liquor and 100-150 parts of clean water as a reference solution. According to the scheme, various industrial byproducts, waste, construction waste and household garbage are applied to a preferred UHPC formula, and the cost is greatly reduced on the basis that the strength is slightly reduced or even the strength is not reduced.