The ball head deviation adjustment of the polished rod sealer is an important component used in optical fiber communication system. Its main function is to correct the deviation of the polished rod by adjusting the position of the ball head when the polished rod moves, so that the polished rod is not eccentric and the service life of the polished rod is prolonged. Specifically, the ball head deviation adjustment can correct the deviation of the polished rod by adjusting the position of the ball head, and the dynamic sealing performance of the polished rod can be ensured by the design of the sealing element, so as to ensure the stability and reliability of the polished rod in the use process. The ball head deflection of polished rod sealer also has waterproof and dustproof functions, which can effectively protect polished rod and improve the performance and reliability of optical fiber communication system.