The invention provides a rare earth waste roasting uniform feeding device. The device comprises a feeding box, a feeding port is formed in the top of the feeding box, a smashing cavity is formed in the bottom of the feeding port, a filtering cavity is formed in the bottom of the smashing cavity, a stirring cavity is formed in the bottom of the filtering cavity, a discharging port is formed in thebottom of the stirring cavity, an adjusting table is clamped in the discharging port, a motor groove is formed in one side of the smashing cavity, and a mounting groove is formed in the other side ofthe smashing cavity. Rare earth waste can be smashed through the smashing cavity, when the smashed rare earth waste enters the filtering cavity, a screening net can be driven by a rotating motor to vibrate, accordingly, the rare earth waste is screened, and the screened rare earth waste enters the stirring cavity to be stirred and heated, so that the rare earth waste can be preheated, the workingefficiency of waste roasting is improved, when the rare earth waste passes through the discharging port, the adjusting table can adjust the discharging speed of the rare earth waste, and therefore thesituation that the rare earth waste is accumulated is prevented.