Abstract: In order to recover phosphorus from a calc-siliceous iron tailings in Yunnan, flotation experiments were carried out. The experimental results illustrated that the combination of oxidized paraffin soap and sodium oleate could enhance the collecting ability and improve the foam state. The closed-circuit test results showed that under the conditions of 70% grinding fineness -0.074 mm, 4 kg/t dosage of regulator Na₂CO₃, 2 kg/t dosage of inhibitor sodium silicate, 1.6+0.4 kg/t dosage of combined collector oxidized paraffin soap + sodium oleate, the flotation index of phosphorus concentrate with P₂O₅ grade of 28.32% and recovery of 61.46% was obtained by using the process of one stage roughing, three stages cleaning, one stage scavenging and middling returning in sequence. This study will contribute meaningful reference to the recovery and utilization of phosphorus resources in this kind of iron phosphorus tailings.