The invention relates to a beneficiation method for high-phosphor oolitic hematite. The beneficiation method is characterized in that reverse-flotation dephosphorization is carried out by use of a mixed collector which consists of a cationic collector, namely dodecyloxy propyl ether amine, an anionic collector, namely oleic acid, and an emulsifier, namely tween-20 in proportion, wherein after ore-grinding, mixing and size-mixing, once rough concentrationroughing and three-time scavenging are carried out to abandon tailings; rough concentration bottom flow and bottom flow obtained by primary scavenging are combined and six-time concentration is carried out; bottom flow obtained by the last three times of concentration is subjected to centralized concentration and scavenging to abandon the tailings; foams obtained by secondary scavenging and tertiary scavenging are returned to last operation; bottom flow obtained by primary concentration and scavenging and bottom flow obtained by tertiary concentration are combined, and four-time concentration, five-time concentration and six-time concentration are carried out; foams obtained by secondary concentration and scavenging and tertiary concentration and scavenging are returned to the last operation; the mixed collector is good in selectivity, the foams are high in quality, and the tailings are abandoned twice in the flotation process, so that the return pressure of the process is reduced, the problem that foams, due to a large quantity, cannot be smoothly returned in an oxidized ore flotation process is solved, and therefore, the process is smooth, the phosphor content in the iron ore concentrate can be effectively reduced, and the qualified iron ore concentrates which meet industrial application are obtained.