The invention discloses a rotary baking apparatus for coils, which comprises a frame and is characterized in that a coil baking unit is arranged on the frame; the coil baking unit includes baking box,a baking rotation driving motor, a telescoping cylinder, rotary shafts and rotary bearings; one end of the baking rotation driving motor is fixedly connected with the frame via a fixture; the telescoping cylinder is fixed to an output shaft at the other end of the baking rotation driving motor; the end of a telescopic bar of the telescoping cylinder is axially provided with a positioning clamp hole; the rotary shafts are fixedly connected with the frame via the rotary bearings and bearing blocks; the end of each rotary shaft is provided with a clamp wheel meshed with the corresponding positioning clamp hole; the baking rotation driving motor and the telescoping cylinder are controlled via a control system. After a coil that is painted is rotated to a baking station, the control system commands the telescoping cylinder to act, the positioning clamp holes are driven to fasten to the clamp wheels, the baking rotation driving motor rotates to drive the coil to rotate, the painted coil isbaked by the baking box while rotating until a paint layer is baked to a state of being not prone to flowing, and the quality problem due to paint overflow during subsequent operating is avoided.