Dredging device for preventing blockage of port channel

The invention relates to the field of dredging of inland waterways, and discloses a port channel anti-blocking dredging device which comprises a mud shoveling bucket, a dragging ship and a settling pond, a crushing mechanism is arranged in the mud shoveling bucket, the crushing mechanism is used for crushing broken stones and preventing the broken stones from entering a pipeline to cause blocking, and the crushing mechanism comprises a roller; a plurality of suction holes are formed in the roller, and a plurality of first crushing teeth are fixedly connected to the periphery of the roller. The crushing mechanism is arranged in the mud shoveling bucket, broken stones and hard soil blocks are decomposed, blocking is prevented, meanwhile, the climbing mechanisms are installed on the two sides of the mud shoveling bucket, large rocks or reefs are climbed over when encountering, the tensile suction pipe floating on the water surface is dragged through the dragging ship, and the large rocks or reefs can be effectiv