Return feeder of conveyor

The invention provides a return feeder of a conveyor, and the return feeder comprises a scraper conveyor and a box body. The return feeder is characterized in that the box body is a ring-shaped box body, wherein a conveyor belt of the conveyor passes through from the inner part of a space enclosed by the ring-shaped box body; the box body comprises a horizontal conveying section and a perpendicular section; the perpendicular section comprises a perpendicular lifting section and a perpendicular return section; a material collecting hole is positioned in the horizontal conveying section below the box body; the drive mechanism is positioned above the perpendicular lifting section; a discharge hole is positioned in the horizontal conveying section above the box body; a scraper chain is surrounded on the inner part of the box body through a guide wheel and a drive mechanism; the discharge hole is positioned above the scraper conveyor; the discharge hole is provided with an inclined plate; and the inclined plate is