The　fossil　energy　on　the　earth　is　limited,　and　with　the　energy　shortage　and　the　environment　deterioration,　there　is　an　urgent　need　to　develop　and　use　renewable　energy.　Therefore,　solar　roads　came　into　being.　The　current　research　on　the　structural　performance　of　solar　pavement　is　relatively　lacking,　especially　the　joint　design　be-tween　photovoltaic　(PV)　pavement　unit　structures.　In　order　to　fill　this　research　gap,　in　this　study,　two　different　PIPVT　unit　joint　designs　for　photovoltaic/thermal　integrated　pavement　(PIPVT)　are　proposed,　namely,　dowel　bar　joint　design　and　tongue-and-groove　joint　design.　The　load　transfer　capacity　of　the　two　joint　designs　is　compared　and　analysed　by　ABAQUS　simulation.　By　the　result　of　simulation,　the　most　unfavourable　load　position　was　determined,　and　the　load　transfer　coefficients　of　the　two　joint　designs　were　calculated　to　verify　the　reasonability　of　the　two　joint　designs,　and　to　compare　and　select　the　scheme.　The　results　showed　that　the　load　transfer　co-efficient　of　the　dowel　bar　is　75.7%,　and　its　load　transfer　grade　is　medium;　the　load　transfer　coefficient　of　the　tongue-and-groove　joint　is　88.9%,　and　its　load　transfer　grade　is　excellent.　It　is　recommended　to　use　the　tongue　-and-groove　joint　design.