Quasi-static　experiments　of　concrete　spatial　frame　joints　are　carried　out　under　biaxial　cyclic　lateral　loading.　The　torsional　phenomenon　of　different　joint　types　under　biaxial　cyclically　increasing　horizontal　displacement　loading　is　analyzed,　and　the　shear　mechanism　is　studied　from　the　angle　of　stress　based　on　finite　element　analysis.　In　this　paper,　the　influence　comparison　on　torsional　phenomenon　of　different　joint　types　are　given,　the　further　analysis　shows　that　the　response　of　torsional　vibration　is　the　main　influence　factor　on　shear　capacity　of　core　joints,　and　the　results　of　this　study　can　be　used　to　provide　suggestion　for　the　design　rules　of　joint　core　considering　torsion　effect.