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In this study, acoustic emission (AE) was used to monitor the whole process of tensile and fracture of the self-compacting rubber concrete (SCRC) under fourpoint bending. The AE activities of SCRC during the stretching and fracture process were analyzed by statistical methods to correlate the process of crack propagation with changes in mechanical properties. And by comparing the tensile and fracture properties, the change patterns of crack mode, the cumulative events and energy of AE in the bending process of SCRC with different rubber particles content, the influence of the incorporated rubber particles on the propagation of microcracks, and the macroscopic fracture mechanism were analyzed. Studies showed that with the incorporation of rubber particles, the ductility of the concrete before and after cracking was improved. Due to the weak bonding surface between the rubber particles and the matrix, the microcracks began to propagate at low-stress levels and developed steadily throughout the stretching process. As the rubber content increased, more rubber components participated in the tensile and fracture process. Because of the elastic stretching of rubber particles, the tensile deformation capacity and fracture properties of the concrete have been improved. And in the whole process of tensile and fracture, the cracking of the weak cemented surface of the matrix and the pulling of the rubber particles were more likely to cause shear mode cracks. K E Y W O R D Sacoustic emission, crack classification statistics, crack development, self-compacting rubber concrete, tensile and fracture property | INTRODUCTIONEvery year, millions of tires are discarded all over the world. It's not easily biodegradable, and the resulting "black pollution" will cause great harm to human health and the environment. 1 Concrete is a quasi-brittle multiphase material, and rubber is an elastic material. Processing waste tires into crushed rubber is added to concrete to produce rubber concrete, which not only reduces the use of aggregates but also solves the problem of rubber pollution. And compared with conventional concrete, the incorporation of rubber can improve the concrete ductility, 2 frost resistance, 3,4 energy absorption capacity, 5 and seismic performance. 6 However, crushed rubber is different from traditional rigid aggregates.