The　active　development　and　utilization　of　deep　geothermal　energy　to　compensate　energy　shortage　of　building　heating　is　a　promising　access　to　improve　the　reform　of　energy　supply　side　and　environmental　protection.　In　this　paper,　based　on　the　dynamic　coupling　characteristics　between　the　load　side,　heat　pump　unit　and　buried　pipe　side,　the　model　covering　the　deep　borehole　heat　exchanger　(DBHE)　heating　system　coupled　plate　heat　exchanger　was　established　by　MATLAB　and　TRNSYS.　And　the　influence　law　of　multiple　factors　on　system　was　conducted　to　explore　the　operation　performance　of　system.　The　study　showed　that　with　the　depth　of　DBHE　extending,　increase　of　the　buried　pipe　depth,　the　circulating　fluid　temperature　of　system　increased,　the　average　heat　extraction　of　heating　season　was　gradually　raised,　the　average　energy　consumption　of　system　decreased.　As　the　inlet　fluid　velocity　of　the　buried　pipe　increases,　the　average　Coefficient　of　Performance　(COP)　of　system　gradually　decrease,　i.e,　the　system　energy　consumption　gradually　increased.　The　results　provide　a　theoretical　basis　for　the　further　optimization　of　DBHE　heating　system,　and　have　great　significance　for　practical　engineering　construction.　©　2022　IEEE.