The utility model relates to an insulating knife switch isolation baffle plate, and belongs to the field of hot-line work tools. When a certain knife switch is overhauled in a live-line manner, the distance between the knife switches is very short, and the knife switches beside need to be isolated to ensure the safety of operating personnel, so that an insulating knife switch isolation baffle is needed for insulation isolation, and the operating safety of the operating personnel is ensured. The device comprises a main plate, a handheld rod with a telescopic function, a top stop block, a side stop block assembly and a side stop block assembly mounting groove, wherein the handheld rod is installed on the main plate, the top check block is installed at the end of the handheld rod, the side check block assembly installation groove is formed in the main plate, the side check block assembly is located in the side check block assembly installation groove, and the top check block is matched with the side check block assembly. And after the operation is finished, a force is applied to the hand-held rod, and the insulation knife switch isolation baffle plate can be taken down for repeated use.