Abstract: The damage process and acoustic emission(AE) characteristic of concrete filled CFRP-steel tubular members under bending load was investigated. The results indicated that the loading process could be divided into four stages including elastic, elastic-plastic, descending and softening stages, and AE parameters and waveforms were showed to explain this process properly. The damage degree and the destroy course of concrete filled CFRP-steel tubular members under bending load can be supervised efficiently through AE technology.