Aiming　at　the　low-carbon　economic　dispatch　of　the　integrated　energy　system，this　paper　constructs　a　low-carbon　economic　operation　framework　of　the　comprehensive　energy　system　with　multiple　micro　integrated　energy　systems，and　a　two-level　optimal　dispatch　strategy　of　the　integrated　energy　system　considering　the　green　certificates-carbon　trading　mechanism　is　proposed.　Firstly，the　carbon　emission　intensity　and　carbon　emissions　of　each　node　in　the　energy　network　is　calculated，which　utilize　the　carbon　emission　flow　model.　Secondly，by　analyzing　the　operation　mechanisms　of　carbon　trading　and　green　certificate　trading　markets，the　carbon　trading，green　certificate　trading　model　of　the　micro　integrated　energy　system　are　established，and　green　certificate-carbon　trading　linkage　mechanism　is　designed　to　reduce　the　carbon　trading　fulfillment　costs　of　micro　integrated　energy　system.　Then，a　two-layer　optimal　dispatch　model　of　integrated　energy　system　under　green　certificate-carbon　trading　mechanism　is　established.　The　upper　layer　is　the　economic　dispatch　model　of　power　grid　and　gas　network.　The　lower　layer　is　the　low-carbon　economic　dispatch　model　of　multi　micro　integrated　energy　systems　considering　the　demand　response　with　the　goal　of　minimizing　the　operating　cost.　Finally，the　calculation　example　shows　that　the　proposed　model　can　effectively　reduce　carbon　emissions，decrease　renewable　energy　waste，and　achieve　low-carbon　economic　operation　of　the　integrated　energy　system.　©　2024　Science　Press.　All　rights　reserved.