The reduction kinetics of carbon bearing briquettes of high-phosphorus iron ore under base condition (without adding Na2SO4 and waste plastics), adding 4% Na2SO4 and adding 4% Na2SO4 with waste plastics replacing 25% coke fines were carried out respectively. The results showed that the control process of carbon bearing briquettes under three conditions was gas diffusion. Compared with the base condition, the apparent activation energy of adding 4% Na2SO4 decreased from 204.92 kJ/mol to 158.81 kJ/mol. The addition of 4% Na2SO4 with waste plastics replacing 25% coke fines was also beneficial to the reduction reaction, and the activation energy reduced from 204.92 kJ/mol to 172.89 kJ/mol.