▎ 摘　　要

NOVELTY - Continuously synthesizing nano-iron composite material by green comprises (i) using supercritical extraction technology, extracting the reducing substances from green plants or algal microorganisms containing reducing substances, and diluting with water to obtain solution with mass fraction of 3-60 wt.%, (ii) configuring the iron salt solution with mass percentage of 1-90 wt.%, heating iron salt solution to 30-100℃, impinging the iron salt solution and the solution obtained in the step (i) on the microreactor by the droplet flow to obtain nano-iron material, and (iii) washing the nano iron material obtained in the step (ii), and drying to obtain pure nano iron material. USE - The method is useful for continuously synthesizing nano-iron composite material by green, which is useful for removing environmental pollutant i.e. chemical reduction and repairing groundwater polluted by hydrochloric ether as catalyst self-catalysis Fenton oxidative degradation of antibiotic in water. ADVANTAGE - The method: is simple and easy to amplify to realize batch production; has low cost; and is environmentally friendly.