The utility model discloses a single-phase switch debugging unit and a high-voltage isolating switch debugging device. The single-phase switch debugging unit comprises a main conductive system fixing frame and static contact fixing frames on the left side and the right side of a main conductive system. The upper part of the main conductive system fixing frame is rotatably provided with a moving contact mounting base. The main conductive system fixing frame is also provided with a driving mechanism driving the moving contact mounting base to rotate. The driving mechanism is connected with a torsion sensor device used to measure moment in switching-on and switching-off processes of the main conductive system. In the installation and debugging processes of the high-voltage isolating switch debugging device, the installation of the main conductive system can be finished on ground. Adjustment of the distance between the main conductive system fixing frame and the static contact fixing frame can be realized by a foundation track. The installation and debugging processes are completed on ground. The device overcomes defects that existing aerial work is large in difficulty and high in danger level.