In　order　to　improve　the　performance　of　the　heat　pump　system　under　large　temperature　difference,　this　paper　proposed　a　triple-loop　heat　pump　ventilation　recovery　scheme,　and　an　energy　recovery　performance　test　platform　was　set　up　based　on　the　exhaust　energy　recovery　of　the　building　air-conditioning　system.　The　performance　of　the　single-loop　and　triple-loop　heat　pump　systems　were　tested　under　different　outdoor　temperature　conditions　in　winter　and　summer　through　experiments.　The　results　showed　that　the　overall　performance　of　the　triple-loop　system　was　significantly　higher　than　the　single-loop　under　all　operating　conditions.　Under　winter　conditions,　the　COP　of　the　triple-loop　system　had　reached　to　11.19,　when　the　indoor　and　outdoor　temperature　difference　was　40　°C,　and　the　COP　of　the　triple-loop　was　54.8%　higher　than　the　single-loop.　Under　summer　conditions,　the　growth　rate　of　the　COP　of　the　triple-loop　system　had　reached　to　89.8%,　when　the　temperature　difference　was　13　°C,　and　the　COP　of　the　triple-loop　was　74.6%　higher　than　the　single-loop.　©　2019　International　Institute　of　Refrigeration.　All　rights　reserved.