The utility model relates to the field of daily tools and discloses an expansion bolt disassembling tool. The expansion bolt disassembling tool comprises a detachable first T-shaped wrench and a detachable second T-shaped wrench, wherein the first T-shaped wrench comprises a stressed pipe and a first stressed plate; a through cavity is formed in the stressed pipe; the first stressed plate is arranged on the outer wall of one end of the stressed pipe; a first sleeve is arranged at one end, far away from the first stressed plate, of the stressed pipe; the second T-shaped wrench comprises a stressed rod and a second stressed plate; the stressed rod is arranged in the through cavity; one end, close to the first stressed plate, of the stressed rod extends out of the through cavity; a second stressed plate is arranged at one end, extending out of the through cavity, of the stressed rod; a second sleeve is arranged at one end, far away from the second stressed plate, of the stressed rod; the diameter of the second sleeve is smaller than that of the first sleeve; a protective cover is mounted on the outer wall of the stressed pipe in a sleeving manner. The expansion bolt disassembling tool has the beneficial effects that when the expansion bolt disassembling tool is used, an expansion bolt can be disassembled without damage to the wall; moreover, by virtue of the protective cover, the injury to an operator caused by splashing can be prevented.