Mechanical　and　thermal　properties　of　composite　sandwich　wall　panels　are　affected　by　changes　in　their　external　environment.　Humidity　and　temperature　changes　induce　stress　on　wall　panels　and　their　core　connectors.　Under　the　action　of　ambient　temperature,　temperature　on　the　outer　layer　of　the　wall　panel　changes　greatly,　while　that　on　the　inner　layer　only　changes　slightly.　As　a　result,　stress　concentration　exists　at　the　intersection　of　the　connector　and　the　wall　blade.　In　this　paper,　temperature　field　and　stress　field　distribution　of　UHPC-RW-RC　(Ultra-High　Performance　Concrete-Rock　Wool-Reinforced　Concrete)　wall　panel　under　high　temperature-sprinkling　and　heating-freezing　conditions　were　investigated　by　using　the　general　finite　element　software　ABAQUS.　Additionally,　design　of　the　connection　between　the　wall　panel　and　the　main　structure　is　proposed.　Findings　may　serve　as　a　scientific　reference　for　design　of　high　performance　composite　sandwich　wall　panels.　©　2020　Techno-Press,　Ltd.