Recycled aggregate preparation device and method based on water jet crushing of waste concrete

The invention discloses a recycled aggregate preparation device based on water jet crushing of waste concrete. The recycled aggregate preparation device comprises a high-pressure water pump, a longitudinal high-pressure water jet pipeline, a transverse high-pressure water jet pipeline, a recycled aggregate collection plate and a recycled aggregate grading mechanism. An outlet of the high-pressure water pump is connected with the longitudinal high-pressure water jet pipeline and the transverse high-pressure water jet pipeline, and a port of the longitudinal high-pressure water jet pipeline is connected with a longitudinal high-pressure nozzle. The waste concrete blocks are located above the recycled aggregate collecting plate, a port of the transverse high-pressure water jet pipeline is connected with a transverse high-pressure nozzle, the transverse high-pressure nozzle is located on one side of the recycled aggregate collecting plate, and the recycled aggregate grading mechanism is located below the other si