The invention relates to the technical field of conveying devices, and discloses a rotating-disc type automatic feeding-discharging machine. When the rotating-disc type automatic feeding-discharging machine works, a first stretchable arm is stretched out, sucks up a product to be machined through a sucker device and then is drawn back, a wheel disc rotates by a certain angle to enable the first stretchable arm to be aligned with a machining device with the requirement for feeding, the first stretchable arm is stretched out, places the product to be machined into a machining position and is drawn back, and the feeding work is completed; while the first stretchable arm carries out feeding, a second stretchable arm is stretched into the machining position to suck up a machined product, then is drawn back to exit from the machining position, synchronously rotates by a certain angle along with the wheel disc, and then releases the machined product, and the discharging work is completed. In conclusion, by means of the rotating-disc type automatic feeding-discharging machine, automatic feeding-discharging work is achieved, the work continuity is good, the production efficiency is improved, manual intervention is avoided in the operation process, the safety is improved, and industrial accidents are greatly avoided; meanwhile, the number of employees of an enterprise is decreased, and the production cost is saved.