The　paper　proposes　a　system　enriching　CBM　during　the　transit　with　solar　energy　as　its　heat　source　while　utilizing　the　concentrated　coal　mine　gas　to　a　selective　catalytic　reduction　denitration　system　as　its　reductive　agent.　The　tree-shape　pipeline　is　employed　to　make　good　use　of　solar　and　build　the　appropriate　temperature　and　density　field　in　the　tube.　By　the　density　difference　effect,　coal-bed　gas　can　be　enriched.　The　concentration　of　methane　can　reach　to　80%　after　multistage　enrichment.　Then　the　concentrated　CBM　is　used　as　a　reducing　agent　and　reduces　NOxwith　the　help　of　the　chosen　perovskite　structure　catalyst　which　is　selective　to　the　catalyzed　reaction.　This　new　denitration　system　can　make　the　mass　concentration　of　NOxin　boiler　flue　gas　lower　than　100　mg/m3.　This　system　contributes　to　reducing　greenhouse　gas　and　the　gaseous　pollutants　(NOx)　which　can　cause　acidic　rain　emissions,　while　playing　an　active　role　in　energy　saving.　Besides,　avoiding　using　the　traditional　reducting　agent　(ammonia　or　carbamide),　it　can　save　the　natural　gas　and　energy　consumption　in　the　productive　process　of　ammonia　or　carbamide,　while　avoiding　the　emission　in　the　productive　progress.