The reduction roasting?magnetic separation of iron from carbon bearing briquettes of high-phosphorus iron ores in Hunan was studied, and the effects of reducing temperature, reducing time, basicity, reducing agent, additive agent, and rate of waste plastics replace coke powders on the indexes of metallic iron powders were investigated. The results showed that under the experimental conditions of the basicity 0.8, the molar ratio of carbon/oxygen 0.9, the amount of sodium sulfate 4%, adding waste plastics to replace 25% coke powders, at 1150℃ for 40 min, the metallization rate of 88.77% of the roasted briquettes were obtained, and the final metallic iron powder assaying 91.99% TFe, metallization rate of 92.26% and P content of 0.20% of metal iron fines was obtained with the iron recovery rate of 86.74%.