A lift truck for replacing or overhauling a disconnecting switch comprises a base, trundles, stand columns, a hand wheel, a left transporting base, a left tackle, a left pulley, beams, a right pulley, a right trolley, a right transporting base, a limit plate and a winch, wherein the trundles are installed on the lower portion of the base, the two stand columns are installed on the left side and the right side on the base, the hand wheel is installed on the lower portion of the left side stand column, the left pulley is installed on the upper portion of the left side stand column, the left transporting base is fixedly connected with the left tackle, and the left tackle is installed on the left side stand column. The winch is installed on the right side of the upper portion of the base, the right pulley is installed on the upper portion of the right side stand column, the right trolley is installed on the right side stand column, the right transporting base is fixedly connected with the right trolley, and two ends of the two beams are welded between the two stand columns. The lift truck for replacing or overhauling the disconnecting switch has the advantages of being simple in principle structure and capable of achieving rising and falling through a hand mode or an electric mode, effectively saving physical power of maintainers and improving overhauling or replacing efficiency of a disconnecting link practically, so that reliability of mains supply is improved.