This paper introduced the working principle of cyclonic tiny-bu bble floatation column briefly and mainly analyzed the features of cyclon ic centrifugal force field in the floatation colunm,the floatation role of fine particles in centrifugal force field and the influence of centrifugal force fiel d on the selectivity and the velosity of floatation.The introduction of cyclonic centrifugal force field into cyclonic tiny-bubble floatation can greatly inten sify the dressing effect of fine particles.