The invention discloses steel-slag concrete. The steel-slag concrete is prepared from raw material in parts by volume as follows: 1,100-1,500 parts of steel slag stone, 80-120 parts of mineral powder, 1,000-1,400 parts of iron tailings sand, 200-250 parts of cement, 150-190 parts of water, 10-50 parts of fly ash and 1-12 parts of a water reducing agent. The steel-slag concrete prepared from steel slag instead of stone as coarse aggregate can have counterweight and protection functions, various indexes of the concrete all meet standard requirements of common concrete, and the anti-permeability, the wear resistance and the like of the concrete are even better than those of the common concrete. With massive use of the steel slag, resources such as yellow sand, stone, iron ore and the like are protected, environmental pollution caused by steel slag stacking is reduced, and the ecology is protected.