The　reinforced　concrete　beam　is　an　important　load-resistant　structural　component　in　all　kinds　of　civil　engineering　structures.　Its　damage　resulted　from　any　reasons　will　directly　influence　the　load-carrying　capacity　and　safety　of　the　whole　structure.　The　structural　assessment　of　reinforced　concrete　beam　with　damage　is　therefore　essential　in　structural　maintenance.　In　this　paper,　a　parameter　identification　method　is　proposed　to　assess　the　structural　status　of　reinforced　concrete　beam,　in　which　the　change　of　segment　flexural　rigidity　of　reinforced　concrete　beams　is　identified　based　on　the　static　load　test　results.　The　algorithm　and　realization　procedure　to　identify　the　segment　flexural　rigidity　of　reinforced　concrete　beam　are　described　in　details.　The　method　is　thereafter　successfully　applied　to　a　real　reinforced　concrete　beam　that　is　statically　load　tested　and　the　structural　assessment　is　made.　It　is　demonstrated　that　the　obtained　results　agree　well　with　the　factual　status.　The　proposed　method　can　be　applied　to　the　segment　flexural　rigidity　identification　and　performance　assessment　of　similar　structures.