The study of the low efficiency of the treatment of fine dust in the iron and steel industry has selected the sintering flue gas dust as the object of study, and the multi-field synergistic removal of fine particles from the sintering flue gas by chemical agglomeration, phase change agglomeration, and turbulent agglomeration has been carried out. The effects of phase change agglomeration, chemical agglomeration and turbulent agglomeration on the arrangement of turbulence columns, wind speed and other factors on the multi-field synergistic removal of fine particles were investigated through the multi-field synergistic experimental platform. The results showed that the removal efficiencies of PM10 were 95.41% and 85.91% with the multi-field synergistic treatment methods of chemical agglomeration, phase change agglomeration and turbulent agglomeration, respectively, and the volume-averaged particle size of the fine dust increased from 19.94 μm initially to 237 μm, which is about 12 times of the increase in particle size. By using Design-Expert software for response surface optimization, the maximum removal efficiencies of PM2.5 and PM10 were 96.28% and 86.38%, respectively. After adopting the multi-field cooperative agglomeration technology, the volume-averaged particle size of fine dust was significantly improved, and the removal efficiency of fine particles in the sintered flue gas was high, and the results of the study provide important technical support for the ultra-low emission of the sintered flue gas and the multi-field cooperative agglomeration in the future.