Limiting mechanism for plastic bag production

The utility model relates to the technical field of plastic bag production, in particular to a limiting mechanism for plastic bag production, which comprises a bottom plate and supporting legs, the lower surface of the bottom plate is fixedly connected with the supporting legs, a conveying component is arranged in the bottom plate, and the outer walls of the supporting legs are fixedly connected with the outer wall of a connecting plate. A worm in the limiting mechanism drives a worm wheel to rotate, the worm wheel drives a right end pin shaft to rotate, the right end pin shaft drives a right end chain wheel to rotate, the right end chain wheel drives a chain to rotate, the chain drives a left end chain wheel to rotate, the chains on the upper side and the lower side drive connecting blocks to move, the two connecting blocks move relatively, and the two connecting blocks drive a curved column to move. According to the plastic bag limiting mechanism, the two curved columns slide in the box body and drive the l