Abstract: In order to improve the mechanical properties of tailing brick and solve the problem of tailings storage， the permeable brick was prepared through mixing， molding and curing process preparation， using the roasted iron tailings， cement and fly ash as the gelled material，iron tailings 2.36~4.75 mm as the coarse aggregate. The effect of the addition of roasted iron tailings， water/cement ratio， target porosity and vibration time on the performance of the permeable brick was investigated and performance of the unburned tailings preparation permeable brick was also compared. The results showed that: ① The optimum test conditions for the preparation of permeable brick with roasted tailings are as follow: the addition of calcined tailings of 60%， the vibration time of 40 s， the water/cement ratio of 0.3， and the target porosity of 20%. At the moment， the bending strength of permeable brick is 3.34 MPa in line with the national standard Rf3.0， and the compressive strength is 15.44 MPa in line with the national standard MU15. The permeability coefficient is 2.58× 10-2 cm /s in line with the national standard Grade A standard， and the measured porosity is 23.41%. ② When the addition of the roasted iron tailings is 60%， the best effect is achieved. When the addition of the unroasted tailings is 50%， the best effect is achieved. The bending strength and compressive strength are 3.38 MPa and 14.54 MPa， respectively. The water permeability coefficient conforms to the national Class A standard.In the condition of replacement of addition 10% cement for roasted iron tailing，the mechanical properties of roasted iron tailing is better than that of unroasted tailing，while the permeable coefficient is opposite.

Key words: Permeable brick, Roasted iron tailings, Bending strength, Compressive strength, Permeable coefficient