The invention discloses a multipurpose portable high-voltage isolating switch overhaul worktable. The multipurpose portable high-voltage isolating switch overhaul worktable comprises a worktable board and multiple foldable support legs which are hinged to the worktable board and are used for supporting the worktable board; rolling wheels are arranged at the bottom of the worktable board; and at least one foldable support leg can be turned to the upside of the worktable board. The overhaul worktable can be folded, so that relatively small space is occupied; a platform plate which is made from a polyformaldehyde resin material is light in weight and convenient to carry; the rolling wheels are arranged at the bottom of the worktable board, and the multipurpose portable high-voltage isolating switch overhaul worktable can be used as a trailer by folding one foldable support leg at the bottom of the worktable board and turning another foldable support leg to the upside of the worktable board, so that the high-voltage isolating switch overhaul worktable can be used for multiple purposes, is convenient to carry tools and various modular fixtures and is convenient to use, the work efficiency can be improved greatly, and the labor intensity can be reduced; meanwhile, a series-hole modular fixture structure is formed on the worktable board and via holes are formed in the worktable board, so that more convenience is brought to assembly and disassembly of the isolating switch overhaul fixtures, the work precision can be ensured, and the work efficiency as well as the process quality can be improved.