Based　on　the　study　of　the　relationship　between　structure　and　feedback　of　China＇s　natural　gas　demand　system,　this　paper　establishes　a　system　dynamics　model.　In　order　to　simulate　the　total　demand　and　consumption　structure　of　natural　gas　in　China,　we　set　up　seven　scenarios　by　changing　some　of　the　parameters　of　the　model.　The　results　showed　that　the　total　demand　of　natural　gas　would　increase　steadily　year　by　year　and　reach　in　the　range　from　3600　to　4500　billion　cubic　meters　in　2035.　Furthermore,　in　terms　of　consumption　structure,　urban　gas　consumption　would　still　be　the　largest　term,　followed　by　the　gas　consumption　as　industrial　fuel,　gas　power　generation　and　natural　gas　chemical　industry.　In　addition,　compared　with　the　population　growth,　economic　development　still　plays　a　dominant　role　in　the　natural　gas　demand　growth,　the　impact　of　urbanization　on　urban　gas　consumption　is　significant,　and　the　promotion　of　natural　gas　utilization　technology　can　effectively　reduce　the　total　consumption　of　natural　gas.