The utility model relates to the technical field of plastic pipelines, and discloses a plastic pipeline connecting device with strong sealing performance, which comprises a base, one side of the base is fixedly connected with a motor I, the output end of the motor I is fixedly connected with a two-way
threaded rod, the periphery of the two-way
threaded rod is in threaded connection with two moving blocks, and the moving blocks are fixedly connected with the base. A sleeve shell is fixedly connected to the tops of the two moving blocks, a limiting
assembly is arranged in the base, a worm is rotationally connected to the interior of the sleeve shell, a worm wheel is rotationally connected to the interior of the sleeve shell, the worm and the worm wheel are meshed with each other, and a fixing
pipe is fixedly connected to the interior of the sleeve shell; the worm gear is rotationally connected to the periphery of the fixing
pipe. According to the pipeline clamping device, under the mutual cooperation of the disc, the clamping blocks, the worm, the second motor, the worm gear and other structures, pipelines of different sizes can be clamped and fixed, and therefore complexity is reduced, working cost is reduced, and meanwhile the labor intensity of workers is reduced.