The invention discloses a green and environmentally-friendly construction waste brick. The green and environmentally-friendly construction waste brick is prepared from the following raw materials in parts by weight: 50 to 100 parts of construction waste, 20 to 30 parts of sludge, 100 to 200 parts of municipal wastewater, 20 to 50 parts of calcined lime, 10 to 20 parts of bentonite, 20 to 50 parts of cement, 1 to 6 parts of glass fiber and 3 to 5 parts of an additive. The green and environmentally-friendly construction waste brick disclosed by the invention is high in compression resistance, good in fracture resistance, attractive in appearance and low in cost, and is free of environmental pollution.