In　order　to　study　the　eccentric　compression　performance　of　the　disconnectable　coupling　joint　of　steel　bracing　system　for　foundation　pit,　a　finite　element　model　was　established　and　verified　by　the　existing　test　results.　Based　on　the　numerical　model,　the　influences　of　different　eccentricities　on　the　bearing　capacities　of　the　disconnectable　coupling　joint　were　analyzed,　and　then　the　influences　of　the　key　parameters　of　the　joints　on　the　bearing　and　bending　capacities　of　the　disconnectable　coupling　joint　were　studied　in　detail.　The　analysis　results　show　that　the　eccentricity　of　the　disconnectable　coupling　joints　should　not　exceed　the　outer　edge　of　the　box-body;　the　batten　plate　can　improve　the　flexural　performance　of　the　disconnectable　coupling　joints　effectively;　the　bearing　capacity　and　bending　resistance　of　the　disconnectable　coupling　joints　increase　with　the　steel　wedge　length,　steel　wedge　width,　steel　plate　thickness　and　box-body　length;　and　the　bearing　capacity　and　bending　resistance　of　the　disconnectable　coupling　joints　can　be　improved　evidently　through　the　change　of　the　steel　plate　thickness.　©　2021,　Editorial　Office　of　China　Civil　Engineering　Journal.　All　right　reserved.