To　improve　the　construction　efficiency　and　achieve　a　rigid　connection　under　design　load,　an　innovative　H-section　beam-to-square　steel　tubular　(SST)　column　bolted　connection　with　inclined　braces　is　proposed.　The　innovative　bolted　joint　can　realize　bolted　assembly　between　beam　and　column　as　well　as　between　column　and　column,　and　it　exhibits　satisfactory　stiffness　and　strength　under　earthquake　with　few　bolts.　Three　groups　of　beam-column　bolted　joints　with　different　types　of　inclined　braces　were　designed,　and　tests　and　finite　element　analysis　(FEA)　were　implemented　under　cyclic　loading.　The　mechanical　behaviour,　deformation　process,　failure　modes,　and　energy　dissipation　of　all　specimens　were　observed,　and　the　effect　of　the　type　and　length　of　inclined　brace　on　seismic　behaviour　of　joints　was　analyzed.　The　results　showed　that　all　specimens　exhibited　satisfactory　ductility,　plastic　deformation　capacity　and　energy-dissipation　capacity.　All　tested　joints　with　inclined　braces　showed　failure　mode　of　severe　local　buckling　of　beam　section　outside　the　connecting　area,　and　the　strength,　stiffness　and　energy　dissipation　capacity　of　bolted　joints　with　inclined　braces　were　significantly　improved.　The　joints　with　an　H-shaped　brace　dissipate　more　energy　than　those　with　a　channel　brace,　particularly　when　the　web　of　the　H-shaped　brace　is　perpendicular　to　the　beam　web.　Furthermore,　the　strength,　stiffness　and　energy　dissipation　capacity　of　innovative　joints　with　long　diagonal　braces　are　higher　than　those　with　short　diagonal　braces.　On　the　basis　of　the　test　results　and　numerical　analysis,　simplified　calculations　for　the　slip　resistance,　yield　resistance　and　ultimate　resistance　of　the　bolted　joints　with　inclined　braces　are　proposed　and　validated　against　tests.