Power grid fault diagnosis device

The invention discloses a power grid fault diagnosis device, and particularly relates to the field of power grid fault diagnos.The power grid fault diagnosis device comprises a top plate, two side plates are installed at the bottom end of the top plate, a driving mechanism is installed between the two side plates, an adjusting assembly is arranged at the bottom end of the driving mechanism in a matched mode, and a diagnostic instrument is installed at one end of the top plate; and the bottom end of the diagnostic instrument is connected with a detection head. According to the invention, the fault diagnosis device can clamp electric wires with different sizes on the power distribution network, and can smoothly and automatically move, keep the stress balance of the electric wires and avoid deformation in the diagnosis and movement process of the device, so that the detection accuracy is improved, and according to the fault related information of the power distribution network, the detection accuracy is improved