Preparation method and equipment of recycled concrete

The invention discloses a preparation method and equipment of recycled concrete, and relates to the technical field of recycled concrete. The equipment comprises a base, an aggregate screening assembly is arranged at the top of the base and comprises a screening tank, the screening tank is mounted at the top of the base, and a rotating disc is rotationally mounted at one end in the screening tank; a rotating disc is rotatably mounted at one end of the interior of the screening tank, a rotating ring is rotatably mounted at the other end of the interior of the screening tank, the rotating disc and the rotating ring are connected through a screening ring, supporting pipes and supporting rods, the supporting pipes and the supporting rods are distributed at intervals, and communicating channels are evenly formed in the screening ring. And under the action of pressure difference, the impurities enter the drainage pipe from the dust discharging opening in the top of the screening tank, so that the impurities are pre