The invention relates to the technical field of hoisting tools, and discloses a portable hoisting device. The hoisting device includes a left fixing rod and a right fixing rod which are in spaced symmetrical distribution in the left and right direction; brace rods are fixedly installed on a left anterior casing pipe, a left rear casing pipe, a right anterior casing pipe and a right rear casing pipe through jackscrews, and a horizontal casing pipe is fixed on the top of each brace rod; and the middle part of a front beam and the middle part of a rear beam are respectively sleeved by a front stop collar and a rear stop collar, and a hoisting guideway is arranged under the front stop collar and the rear stop collar. The portable hoisting device is reasonable and compact in structure and easyin usage; the installation can be carried out through the existing equipment of a transformer substation, the floor area is reduced, and thus the device is convenient to carry and install; all the parts of the hoisting device can be fixedly installed together through detachable members, the assembly and the disassembly are convenient and fast, and thus the carrying and transportation are convenient; high strength manual works can be avoided by using the hoisting device to hoist devices in the transformer substation with a compact equipment layout; and the hoisting device has characteristics ofbeing safe, labor-saving, easy and efficient.