New and old channel connection waterproof structure

The utility model discloses a new and old channel connection waterproof structure, and relates to the technical field of pipelines, the new and old channel connection waterproof structure comprises a new pipeline and an old pipeline, the outer wall of the new pipeline and the old pipeline is sleeved with a sealing gasket, the outer wall of the sealing gasket is sleeved with a limiting sleeve, and the outer wall of the limiting sleeve is sleeved with a fixing sleeve; fixing seats are fixedly installed at the two ends of the fixing sleeve, sealing rings are rotationally connected to the outer walls of the new pipeline and the old pipeline, and clamping grooves are formed in the inner walls of the sealing rings. The intersection of the new pipeline and the old pipeline is further sealed through the limiting sleeve, then the two fixing sleeves are fixedly connected in a penetrating mode through the two fixing bases, and therefore the new pipeline and the old pipeline are integrally sealed, and the stability of th