Municipal sewer repairing device and repairing method thereof

The invention relates to a municipal sewer repairing device and a repairing method thereof, and belongs to the technical field of municipal pipeline repairing. The repairing device comprises a water-repellent mechanism, the water-repellent mechanism comprises a water-repellent disc, a supporting oil cylinder, a mounting plate and a fixing assembly for fixing a mounting table in situ, the supporting oil cylinder is mounted on the mounting plate and drives the water-repellent disc to move, a rubber ring is arranged on the edge, away from the supporting oil cylinder, of the outer wall of the water-repellent disc, an extrusion ring is arranged on the edge, close to the supporting oil cylinder, of the outer wall of the water-repellent disc, and the rubber ring can be attached to the outer wall of the extrusion ring when turning over towards the extrusion ring. The repairing method comprises the following steps of (1) water blocking and cleaning and (2) repairing. The municipal sewer repairing device and the repair