Quasi-static　experiments　of　prestressed　concrete　spatial　frame　joints　and　RC　spatial　frame　joint　are　carried　out　under　different　axial　compressions　and　uniaxiaL/biaxial　cyclic　lateral　loading.　The　relationship　between　force　and　displacement　is　obtained　with　different　loading　approaches.　Through　the　analyses　of　failure　process,　carrying　capacity　,　stiffness　,　ductility　and　dissipating　energy　,it　can　be　concluded　that　the　coupling　effect　is　obvious　under　biaxial　lateral　load　,　the　torsional　phenomenon　exists　in　specimens,　the　degradations　of　strength　and　stiffness　are　more　serious　and　the　ability　of　dissipating　energy　is　reduced.