Abstract: Through carbonization and Fe additive with Jixi bituminous coal as a raw material, the author research on a preparation of CMS using in production of nitrogen rich air with air separation and examine. The influence of carbonization condition and Fe additive on the air separation performance of the products, the influence of carbonization conditions such as the carbonization temperature, the heating rate and the holding time as well as the additives such as coal tar, Fe3O4 and their ratio in the raw material were studied. It is concluded that Jixi bituminous coal is a good raw material for preparation of CMS. The optimum carbonization conditions are bond dosage 35w%, Fe additive (Fe3O4) 25.3w%, heating rate 10 ℃/min, final carbonization at 900 ℃ for 60 min.