The　paper　designed　three　joints　namely　beam-column　joint　of　reinforced　concrete　frame　without　slab　and　two　beam-column　joints　of　reinforced　concrete　frame　with　slab,　using　different　loading　methods　(one　direction　and　two　directions)　to　experiment.　The　paper　studied　failure　behavior,　load-carrying　capacity,　and　slab　participation　in　flexural　behavior　of　beam　under　different　loading　modes.　Experiment　shows　that　for　the　joints　with　slab,　flexural　capacity　at　end　of　the　beam　under　two　direction　loads　than　one　direction　loads　lows　by　about　10%;　under　one　direction　load,　effective　flange　width　of　slab　should　be　taken　8　times　thickness,　under　two　direction　loads,　effective　flange　width　of　slab　should　be　taken　10　times　thickness.