The invention discloses a microwave feedback energy device based on a large-scale rotation device, comprising a rotation device (1), an arc waveguide (2) which is installed on the outer circumference of the rotation device (1), and an inhibitor (3) which is installed on the upper position and the lower position of the arc waveguide (2); the rotation device (1) is round-shaped; the section cross of the rotation device (1) is concentric with the cross section of the arc waveguide (2); the circumference of the rotation device (1) is provided with a microwave feed-in groove (4); and the arc waveguide (2) is provided with a slit corresponding to the size of the microwave feed-in groove. The invention is reasonable in structure, good in safety, uniform in microwave distribution, and higher in microwave heating efficiency particularly for the large size rotation device, and has no the microwave leakage, can realize the scientific combination of the waveguide and the rotation device, greatly improves the heating efficiency of the microwave oven, can solve the technology difficulty of the energy feed which cannot be realized by the regular fixed waveguide and the rotation device, and solves the problem that microwave of the large scale rotation device cannot act on the material.