The invention relates to a live replacement isolating switch framework pillar device. The device comprises an E type elastic strip, an adjustable flexible pipe, a 0.5 ton single-plunger hydro-cylinder, hydraulic pedal, universal wheels, a flat foot cup, a base, a pressure regulating valve, a height adjusting fixing pin, and a fixing supporting plate. The flat foot cup is arranged on the base, andthe 0.5-ton single-plunger hydro-cylinder is arranged on the base; a pressure regulating valve and the hydraulic pedal are arranged on the 0.5 ton single-plunger hydro-cylinder, and an adjustable telescopic pipe is arranged above the 0.5 ton single-plunger hydro-cylinder; and the height adjusting fixing pin is arranged in the middle of the adjustable telescopic pipe, the fixing supporting plate isarranged above the adjustable telescopic pipe, and the E type elastic strip is arranged in the fixing supporting plate. The live replacement isolating switch framework pillar device has the advantages that a power grid can be replaced in a live state without power failure, so that the power supply reliability is improved; the assembled structure can be dispersed for transportation, damages in thetransportation process are avoided and the device is convenient to transport and install; and the requirements of different working conditions on site are met, and the working efficiency is improved.