In order to improve the performance of coarse aggregate in recycled concrete and enhance the crack resistance of recycled concrete beams, the recycled coarse aggregate was soaked with MMA impregnation solution, and the effects of different pre-stressed tensile control stress and longitudinal reinforcement ratio on the crack resistance of recycled concrete beams were studied. The results show that the mid-span deflection of recycled concrete beams can be effectively reduced by soaking the recycled coarse aggregate with MMA impregnation solution, and the cracking load and yield load are significantly increased with the increase of pre-stressed tensile control stress.