[Purposes] This paper investigated the effects of the particle size and the content and curing age of recycled aggregate on the mechanical properties of cement-stabilized recycled aggregate mixture. This study also aimed to provide a guidance for the fine utilization of recycled aggregate with different particle sizes. [Methods] The recycled aggregate was divided into three grades according to particle size, that is, [4.75,9.5) mm, [9.5,19) mm, [19,26.5) mm. The cement-stabilized recycled aggregate mixture specimens were prepared with 4% cement content and different percentages of recycled aggregate. The dry density, unconfined compressive strength, splitting strength and compressive resilient modulus of the cement stabilized recycled aggregate mixture were tested. [Findings] The optimum moisture content increased and the maximum dry density decreased with the increase of the particle size and recycled aggregate content. When [4.75, 9.5) mm recycled aggregate was added, the mechanical properties of the cement stabilized recycled aggregate mixture first increased and then decreased with the increase of the recycled aggregate content. When [9.5, 19) mm recycled aggregate was added, the unconfined compressive strength and compressive resilient modulus of the cement stabilized recycled aggregate mixture first increased and then decreased with the increase of the content, while the splitting strength decreased with the increase of the content. When [19, 26.5) mm recycled aggregate was added, the mechanical properties of the cement stabilized recycled aggregate mixture decreased with the increase of the content of recycled aggregate. [Conclusions] The variation law of mechanical properties of cement stabilized recycled aggregate mixture is different with the change of recycled aggregate content and particle size. In general, the larger the amount of recycled aggregate and the particle size, the worse the mechanical properties of the cement stabilized recycled aggregate mixture are.