Acoustic　emission　(AE)　technique　was　used　to　characterize　the　damage　fracture　process　of　reinforced　concrete　(RC)　beam　subjected　to　four-point　bending.　Mechanical　performances　and　AE　parameters　were　recorded　through　laboratory　experiment.　Gaussian　filtering　was　adopted　to　interpret　the　AE　energy　and　e-value　obtained　during　testes　to　characterize　the　crack　intensity　and　behavior.　The　results　reveal　that　Gaussian　filtered　AE　energy　can　realize　the　identification　of　the　damage　fracture　process,　and　five　stages　can　be　classified.　As　for　Gaussian　filtered　o-value,　crack　behavior　identification　effect　of　o-values　calculated　from　all　sensors　is　unsatisfactory.　However,　Gaussian　filtered　6-values　obtained　from　amplitudes　recorded　through　sensors　at　critical　damage　regions　present　clear　trend　and　favorable　identification　effect.　©　International　Workshop　on　Structural　Health　Monitoring.　All　rights　reserved.