By means of mechanism analysis and experimental verification, pre mixing thick cement paste method was proposed to improve the performance of recycled aggregate concrete(RAC). By using this method and traditional mixing process, the statistical distribution law for 28d compressive strength of RAC was compared. The results show that the 28d compressive strength of RAC can be increased by 8%19% compared with the traditional mixing process. At the same time, the pre mixing concrete method can improve the workability and durability of RAC obviously without changing the mix proportion, and provide technical reference for the preparation of RAC.