The invention discloses a combined desliming process capable of being used for beneficiation. The combined desliming process includes the steps: performing first-stage grinding and first-stage classifying for crushed ore products, returning underflow to first-stage grinding, and performing second-stage classifying for overflow; performing second-stage grinding for the underflow after second-stage classifying, and returning ground discharging to second-stage classifying; subjecting the overflow to low-intensity magnetic separation, performing concentration, slag separation and high-intensity magnetic separation which has the effect of first-stage desliming for tailings subjected to low-intensity magnetic separation, and subjecting magnetic concentrates to third-stage classifying; performing third-stage grinding for the classified underflow, and returning the discharging to third-stage classifying; and subjecting the overflow to second-stage desliming, performing low-intensity magnetic roughing separation for the underflow after second-stage desliming to obtain rough concentrates, and subjecting the tailings to third-stage or more than fourth-stage desliming. Besides, a densifier and a selective flocculation desliming process are adopted for desliming at each stage. The combined desliming process capable of being used for beneficiation has the advantages of low investment cost, small occupied area, convenience in production and maintenance, high adaptability, good desliming effect and the like.