Rotary heating device

The invention provides a rotary heating device which comprises a housing, a rotary material bed and a support frame, wherein the housing is provided with an inner chamber; the rotary material bed is rotationally arranged in the inner chamber of the housing, and is provided with a feed opening; at least part of the support frame is arranged in the housing, and supports the rotary material bed from a position nearer to the circumferential edge of the rotary material bed than the revolving shaft of the rotary material bed. The rotary heating device has the advantage that flexion generated during the rotation process of the rotary material bed of the rotary heating device in the prior art is avoided effectively.