The invention provides a method for separating mineral impurities in corundum abrasive materials. The method comprises the following specific steps of: 1. firstly grinding corundum particles; 2. adsorbing pure iron debris by a magnetic separation method to separate the pure iron debris from the products; 3. soaking the products with excessive HF or NaF or mixed acid liquor of HF and NaF to break and dissolve glass phases; 4. mixing and stirring the products, concentrated sulfuric acid and concentrated nitric acid uniformly, heating the mixture to 190-210 DEG C in a heater and preserving heat for 50-70 minutes or until the volatile materials of the acid liquor are hardened; and 5. putting the hardened materials into dilute sulfuric acid liquor, dissolving and dispersing residues generated through reactions in the above steps and then separating solid and liquid phases through filtration, thus obtaining the solid-phase substance, namely physical corundum. By adopting the separation method, most mineral impurities in the primary products are effectively removed, thus improving the purity of corundum, ensuring normal color development of corundum, simultaneously improving the properties of corundum and widening the purposes of corundum.