Damping,　as　one　of　the　most　important　indicators　of　the　structure＇s　dynamic　behaviors,　depicts　how　energy　dissipates　during　vibration.　Using　Hammering　Method　on　Reinforced　Concrete　Simply　Supported　Beam　model　dynamic　experiment,　by　analyzing　the　vibrating　signals　captured　during　hammering　process,　how　the　allocation　of　the　sensors　and　the　hammer　strength　affect　the　parameter　identification　can　be　revealed.　A　rational　method　of　parameter　identification　can　be　presented　as　well.