The invention discloses a secondary safety isolation tool for a current terminal, and aims to provide a secondary safety isolation tool with good universality for a current terminal. The secondary safety isolation tool comprises a plurality of isolation blocks made of an insulating material and an insulating rod used for connecting the isolation blocks, wherein the isolation block comprises a baseand an insertion part, and the insertion part is arranged at one end of the base and used for blocking a terminal block sliding block; the base is provided with a through hole for the insulating rodto pass through, and the insulating rod is in friction engagement with the through hole; and the bases are arranged on the insulating rod in parallel through the through holes in a penetrating mode. The secondary safety isolation tool is applicable to secondary isolation of terminal blocks with various specifications.