Reducer convenient for seamless connection and used for conveying fluid

The utility model is applicable to the technical field of reducing pipes, and provides a reducing pipe convenient for seamless connection and used for conveying fluid, which comprises a pipeline body, a first rubber ring, a second rubber ring, a first buffer plate and a second buffer plate, the large-diameter pipeline is connected into the large-diameter connector pipeline to be clamped with the first rubber ring, the small-diameter pipeline is connected into the small-diameter connector pipeline to be clamped with the second rubber ring, and fluid sequentially passes through the first conveying pipeline, the second conveying pipeline and the third conveying pipeline and then flows out of the small-diameter pipeline. The first rubber ring and the second rubber ring guarantee that no fluid overflows when the pipeline and the reducing pipe are tightly combined for conveying, the first buffer plate, the buffer ring and the second buffer plate can decelerate water flow during conveying, the stability of fluid flo