Abstract: From viewpoints of resources regeneration，environmental protection and circular economy，the re-graded waste rocks in Miyun area were prepared as coarse aggregate，and iron tailings were prepared as fine aggregate.Then，iron tailings，blast furnace slag，cement clinker and FGD gypsum were mixed and ground to produce the mixture.Steel slag that was ground alone are together with the mixture to prepare cementitious materials.The high-strength concrete materials were produced with the cementitious materials and aggregates，by adding water- reducing agent and water.The changes of microstructure and phase composition of the high- strength concrete were studied by XRD，SEM，EDS，et al.Based on this，its reaction mechanism is analyzed.The produced concrete materials obtained the compressive strength as high as 75.92 MPa at 28 d and the content of wastes in products reached 91%.The replacement ratio of natural sands and rocks was 100% while natural sands were replaced by Miyun iron tailings and natural rocks were replaced by Miyun waste rocks.

Key words: Waste rock, Iron tailing, Aggregate, High-strength concrete