In order to solve the problem of low removal efficiency of fine particles in sintering gas, the 1～4 electric field of the sintering head and the dust ash at the tail are selected as the research objects, and the particle size distribution, element composition, phase composition and particle morphology of the original ash sample are tested, the change law of the pore structure and wettability of the dust ash at different positions is analyzed, and the removal effect of the cloud dust removal method on the sintering fine dust is investigated. The results show that with the increase of the electric field stage of electric precipitator of sintering gas, the larger dust particles gradually decrease and the fine dust particles gradually increase, indicating that the large particles of dust are preferentially accumulated, while the small particles of dust are not easy to be captured due to the small electric field force, resulting in the low dust removal efficiency of fine particles. The results of contact angle measurement show that the contact angle of sintering electric precipitator ash is less than 60° , which is a wettable dust, and has good adaptability to remove fine dust by cloud dust removal method. Through the test of the removal effect of fine particulate matter by cloud dust collector, the removal efficiency of PM_2.5? and PM_10? is greater than 80% . The results can provide an effective method and technical support for the efficient removal of fine particles in sintering gas.