The invention discloses a pipeline opening repairing device, and belongs to the technical filed of oil and gas storage and transportation. The pipeline opening repairing device comprises a heating assembly and an electrical signal input assembly. The heating assembly comprises a supporting structure and an electric conducting coil; the heating assembly is of a barrel-shaped structure, and the inner diameter of the heating assembly is greater than the outer diameter of a conductor pipeline; when the conductor pipeline is sleeved with the heating assembly, the conductor pipeline is sleeved with the electric conducting coil, and the electric conducting coil is sleeved with the supporting structure; and the electrical signal input assembly is connected with the electric conducting coil, and electrical signals with preset frequencies can be inputted to the electric conducting coil by the electrical signal input assembly. According to the pipeline opening repairing device, the problem of the bad effect of pipeline opening repairing is solved, and the good repairing effect is achieved. The pipeline opening repairing device is used for opening repairing of a pipeline.