The invention provides a blast furnace dam material. The blast furnace dam material is prepared from, by weight, 26-35 parts of fused magnesite, 22-28 parts of crystalline flake graphite, 30-36 parts of heavy calcium powder, 2-5 parts of zircon sand, 3-5 parts of silicon carbide micro-powder, 2-4 parts of oil wetting agent, 1-3 parts of heat stabilizer and 2-4 parts of water. According to the scheme, the defects of traditional blast furnace iron runner and slag runner damming materials are effectively overcome, the defects that the traditional damming materials are poor in forming property, prone to iron seepage, dam collapse, iron running and overall sintering and not resistant to scouring or corrosion, so that later dam poking is affected are compressively overcome, and tapping production of a blast furnace is greatly stabilized; labor intensity and the production cost are greatly reduced, production safety of the blast furnace is powerfully guaranteed, and the blast furnace dam material is wide in market space and huge in promotional value.