Cutting device for foreign matter between secondary side heat transfer pipes of nuclear power plant steam generator

The invention particularly relates to a cutting device for foreign matters between secondary side heat transfer pipes of a steam generator, which is characterized by comprising a guide rail mechanism (20), a guide mechanism (21) and a flexible cutting tool, the guide rail mechanism (20) is installed between a 0-degree hand hole and a 180-degree hand hole of the steam generator, the guide mechanism (21) is installed on the guide rail mechanism (20) in a sliding mode, and the guide mechanism (21) can move front and back on the guide rail mechanism (20) along a central pipe gallery of the steam generator; the guide mechanism (21) is connected with the flexible cutting tool, and the guide mechanism (21) slides on the guide rail mechanism (20) to drive the flexible cutting tool to stretch into any position between heat transfer pipes of the steam generator. According to the cutting device for the foreign matter between the secondary side heat transfer pipes of the steam generator, cutting of the foreign matter bet