The present invention relates to the technical field of polysilicon reduction furnaces, and specifically to a polysilicon reduction furnace, comprising a furnace body, wherein the lower end of the furnace body is fixedly connected to
discharge pipes at positions near both sides, the lower end inner wall of the furnace body is fixedly connected to a base, the upper end of the base is plugged with
silicon rods, the lower end of the furnace body is located between the two
discharge pipes and the two sides are fixedly connected to air inlet pipes, the upper end of the furnace body is fixedly connected to an
exhaust pipe, a scraping mechanism is provided inside the furnace body, the scraping mechanism comprises a cross bar, the cross bar is fixedly connected to the inner wall of the
exhaust pipe, the upper end of the cross bar is rotatably connected to a
fan blade, the lower end of the outer wall of the
fan blade is rotatably connected to a belt, which can continuously scrape the polysilicon generated by the reduction on the surface of the
silicon rod to avoid accumulation on the surface of the
silicon rod that affects the
heat generation capacity of the silicon rod, improve the reduction reaction capacity of silicon, make the quality of the product purer, and improve the practicability of the device.