Full-automatic tying and ring-sleeving device and operation method for same

The invention discloses a full-automatic tying and ring-sleeving device and an operation method for the same. The full-automatic tying and ring-sleeving device comprises a centering absorption pipe, first clamping jaws, a first air cylinder and a second air cylinder, wherein the first clamping jaws and the first air cylinder are arranged on the periphery of the upper end of the centering absorption pipe; a bag port of a bag is taken into a gap formed when the first clamping jaws open by the first air cylinder; second clamping jaws, pressing blocks and the second air cylinder are arranged over the centering absorption pipe and placed on the upper end of a place, where the first clamping jaws lie; and the pressing blocks are connected with the centering absorption pipe; the second air cylinder drives the pressing blocks to move to control open-close of the second clamping jaws. With the arrangements of the first air cylinder, the second air cylinder, the centering absorption pipe, the pressing blocks, the first