Steam turbine rotor welding defect testing device and method

The invention relates to a steam turbine rotor welding defect testing device, comprising: a main body mechanism comprising a welding flaw detector; a display screen is embedded in one side of the welding flaw detector; the top of the welding flaw detector is electrically connected with a transmission line; the welding flaw detector and the transmission line are fixed through threads; the end, away from the welding flaw detector, of the transmission line is electrically connected with a probe. The probe is fixedly connected with the transmission line. The welding flaw detector has the beneficial effects that the problems that when the welding flaw detector is used, due to the fact that the welding flaw detector does not have a supporting function, a user needs to hold the welding flaw detector all the time when needing to inspect multiple welding places, the fatigue degree of the user is greatly improved, and the welding flaw detector is inconvenient to use are solved. And meanwhile, dust is scattered and some