Abstract: Taking iron tailings as the main raw material, expanded perlite as pore forming agent, the coal gasification ash and albite were added to prepare iron tailings sintered permeable brick. The effects of ash/slag ratio, the content of expanded perlite, the particle size of expanded perlite, sintering temperature and heat preservation on the mechanical properties and permeability of sintered permeable brick were investigated through the orthogonal experiment, and the micro-morphologies of sintered products were analyzed. The results show that the flexural and compressive strengths of permeable brick increase with the increase of iron tailings content, the permeability increases with the increase of the content and particle size of expanded perlite. The main crystalline phases of sintering products of permeable brick are hematite, quartz, mullite minerals and diopside. When m(iron tailings)∶ m(coal gasification ash)∶m(albite)=85∶7.5∶7.5, mixed with expanded perlite pore forming agent with mass fraction of 20% and particle size of 0.45-0.90 mm, at the sintering temperature of 1 090 ℃ for 1 h, the sintered permeable brick with good comprehensive performance can be prepared, and the internal connecting pore diameter is large and many, with flexural strength of 3.74 MPa, compressive strength of 18.41 MPa, permeability coefficient of 0.011 cm/s and porosity of 28.57%, its performance can meet the R_f3.5 flexural strength grade requirements in GB/T 25993—2010.