Microbial induced carbonate precipitation can achieve the crack self-healing in concrete. Bacterial carrier can effectively improve the survival rate of bacteria in concrete matrix and thus improve the crack self-healing effect in concrete. However, potential decrease in mechanical properties, poor compatibility with the cementitious matrix and relatively high cost of the current bacterial carrier cannot be ignored. The self-healing concrete based on enhanced recycled concrete aggregates as bacterial carrier is proposed in this paper. The influence of enhancement time of recycled concrete aggregate on the compressive strength and self-healing capacity of concrete was studied to determine the reasonable mineralization enhancement time of recycled concrete aggregates, and the enhancement mechanism of recycled concrete aggregates and self-healing mechanism of concrete are revealed. The experiment result shows that the reasonable enhancement time of