The invention discloses a fully automatic film expansion inner ring feeding mechanism. The fully automatic film expansion inner ring feeding mechanism comprises a first table plate and a second tableplate; a feeding push plate is slidably mounted on the position, located on the lower side of a film expansion inner ring, on the first table plate, and a storage groove with the same size as the filmexpansion inner ring is formed in the upper surface of one end of the feeding push plate; a support is fixedly mounted on the second table plate, a slide rail is arranged in the horizontal directionon the support, a sliding block is slidably mounted on the slide rail, and an inner ring carrying cylinder driving the sliding block to move left and right is further fixedly mounted on the slide rail; an inner ring feeding pressing down air cylinder is further mounted vertically on the sliding block, and an inner ring buckle plate is fixedly mounted at the expansion end of the inner ring feedingpressing down air cylinder; and a film expanding load table is further fixedly mounted on the second table plate. According to the fully automatic film expansion inner ring feeding mechanism, the filmexpansion inner ring can be automatically sent from a storage area to an operation area for film expansion operation, no manual placement is required, the labor intensity of workers is reduced, and the production efficiency of the film expansion is improved.