Abstract: The acoustic emission(AE) technique was used to study the failure behavior of carbon fiber reinforced polymer(CFRP) bolted joints with different geometric sizes under static load, and the relationship between the damage behavior of the joint and the AE signal under different geometric was compared. The AE technology was used to collect and convert the AE in the process of structural damage, and the relationship between the amplitude, entropy curve, Andrews curve and the failure behavior was analyzed by combining the load-displacement curve of CFRP bolted and the macro/meso damage morphology. The results show that the load-displacement curves of bearing and shear failure specimens show obvious plastic characteristics. When the specimen is failure in bearing and shear, the AE is the medium amplitude signal, and a small number of high amplitude signals are accompanied. The medium amplitude signal occurs when the tensile damage happens. According to the characteristics of entropy curve, the failure process of CFRP joint is divided into four stages, and the failure modes such as fiber fracture and delamination occur at the stage of damage evolution, and the failure is dominated by delamination failure in the stage of structural failure. Based on the Andrews curve analysis, a variety of damage types are found in the failure evolution stage of the bearing and tensile failure modes, and many types of damage will appear in the failure stage of the shear failure mode.