The invention discloses a bidirectional clamping device for assembling and disassembling contact fingers of a GW-5-type isolating switch. The bidirectional clamping device comprises a quadrilateral frame formed by connecting baffle plates I and baffle plates II, wherein the quadrilateral frame is internally provided with a left sliding block and a right sliding block at two transverse ends; a right-hand threaded hole is formed in an adaptive position in the middle part of the left sliding block, a left-hand threaded hole is formed in an adaptive position in the middle part of the right sliding block, the right-hand threaded hole and the left-hand threaded hole are symmetric, and a matched integral transmission lead screw is arranged in each of the right-hand threaded hole and the left-hand threaded hole; adaptive positions on both sides of each of the left and right sliding blocks are provided with sliding block guide rails, the sliding block guide rails are matched with guide rail sliding grooves formed in the baffle plates II, and a groove is formed in the middle part of the upper end of each baffle plate II. The bidirectional clamping device eliminates the mechanical injury to a human body caused by assembling and disassembling the contact fingers of the GW-5-type isolating switch in field maintenance operation, completely realizes the easy operation by a single person, effectively improves the operation efficiency and maximally guarantees the personal safety.