The invention relates to a novel hard shielding cover of a pole-mounted isolating switch for uninterrupted power supply. The main body is a semi-closed shell-shaped cover body. The shielding cover ischaracterized by comprising an arc-shaped groove, a lock catch and an insulating rod operating table, wherein one end of the arc-shaped groove is provided with the lock catch, and the lock catch and the arc-shaped groove can rotate relatively; and the insulating rod operating platform is arranged on one side outside the arc-shaped groove, and the arc-shaped groove and the insulating rod operatingplatform are fixedly or detachably connected with each other. The shielding cover has the advantages that the hard shielding cover replaces a soft insulating blanket to serve as an insulating shielding tool, so that the operation difficulty is reduced, and the physical strength of an operator is saved; the production cost is lower, the service life is longer, the external force damage resistance is stronger, and the detection period is longer; the installation is convenient and efficient, the shielding is tight, the problem that the traditional insulating blanket can only be installed throughan insulation glove operation method and is complex in insulation shielding process, great in dependence on professional skills of the operator and easy to be untight in shielding and the like is solved, the work efficiency is improved, the operation time is shortened, and the operation safety is improved.