In order to improve the permeability of laterites sinter bed, the effects of granulation moisture and time, cylinder mixer speed and wetting time on the granulation performance are researched to get the suitable conditions of granulation process enhancement; meanwhile, in order to further improve the permeability of laterites sinter bed and sintering performance, the fabric process optimization is carried out on the basis of granulation process enhancement, and the related mechanism is revealed. The results show that: compared with the baseline, the permeability index of granulation process enhancement is increased from 0.233 to 0.347; meanwhile, the sintering performance is improved significantly, and the yield, drum strength and utilization coefficient are increased from 68.69%, 51.73% and 0.77 t/(m²·h) to 72.53%, 56.80% and 0.84 t/(m²·h), while the solid combustion consumption is decreased from 147.10 kg/t to 143.68 kg/t. The permeability index of the mixture layer of granulation process enhancement is increased from 0.347 to 0.418 after the adoption of the layered graded fabric method; meanwhile, the sintering performance is improved significantly, and the yield, drum strength and utilization factor are further increased to 75.14%, 63.47%, 1.08 t/(m²·h), and solid fuel consumption is decreased to 132.01 kg/t.