Abstract: The provided is a device for preparing an artificial aggregate by pressure injection and solidification of a powder-based solid waste, pelletization, and magnetic shell reinforcement. The device includes a pressure injection and solidification module, a rolling particle screening module, a zonal temperature-controlled sintering module, and a magnetic shell reinforcement module that are arranged in sequence from front to back, where the pressure injection and solidification module, the rolling particle screening module, the zonal temperature-controlled sintering module, and the magnetic shell reinforcement module are connected by conveyor belts. The device provides a function of pressure-injecting slurry with a specific function into the center of the artificial aggregate to improve the overall performance of the artificial aggregate. The device achieves rapid aggregate pelletization, and provides pressure for the forming process through elastic wheel sets.