Abstract: Aiming at further exploring the sustainable application of recycled coarse aggregate in green buildings, the influences of steel fiber contents (0, 0.5%, 1.0%, 1.5%), recycled aggregate replacement ratios (0, 30%, 50%, 100%) and loading rates (0.02mm/s, 0.20mm/s, 2.00mm/s) on the mechanical properties and internal damage evolution of steel fiber reinforced recycled aggregate concrete (SFRAC) under dynamic tensile loads were studied using Brazilian disc splitting test and acoustic emission technology. The results indicate that the recycled coarse aggregate makes the dynamic splitting tensile strength of recycled concrete worse significantly. But 1.0% and 1.5% steel fiber can not only effectively improve this negative effect, but also enhance the toughness and energy absorption capacity of concrete. The maximum increase in dynamic split tensile strength is 10%. Furthermore, the evolution of crack pattern of SFRAC under dynamic axial tensile load is well reflected by the rise angle and average frequency, and the proportion of shear cracks increases with the loading rate raising, providing reference for the control of recycled aggregate content in actual engineering.