Twist contraction preventing device for over-twisted yarns

The invention discloses a twist contraction preventing device for over-twisted yarns. A top plate, a yarn storage tube and a rotating bottom plate are arranged at one time from top to bottom, and the top plate, the yarn storage tube and the rotating bottom plate are connected through a main shaft, wherein the top plate is provided with a yarn outlet guide ring, and the rotating bottom plate is provided with a yarn inlet guide ring. The device can effectively improve non-uniform tension and prevent twist contraction in the channel bobbin forming process. Therefore, the forming quality of a bobbin is controlled, the hardness of the bobbin is ensured, and the hardness of the bobbin is uniform.