An automatic staged object feeding and discharging system includes a table, feeding device, staged feeding and discharging device and robotic arm; the staged feeding and discharging device has a feeder and distributing device in such a way to adjust a feeding and discharging angle of the distributer in a two-stage manner upon object feeding and discharging, allowing the robotic arm to grip material pieces conveniently, thereby decreasing the cost and increasing the processing speed.