Aligning and positioning device for full-automatic round bottle labeling machine

The utility model discloses an aligning and positioning device for a full-automatic round bottle labeling machine, relates to the technical field of round bottle labeling machines, and aims to solve the problems that the aligning position of an existing round bottle labeling machine is mainly fixed, only round bottles of the same specification can be aligned and positioned, and large or small round bottles are easy to cause aligning deviation, so that the production efficiency is high, and the like. Therefore, the problem that the alignment position needs to be manually adjusted in advance before the equipment operates is solved. Side mounting tables are arranged on the two sides of the round bottle conveying table, and mounting grooves are formed in the middle positions of the side mounting tables; the electric cylinder is mounted in the mounting groove in one side in a threaded mode, the electric cylinder comprises a first piston rod, a push plate is mounted at one end of the first piston rod in a threaded