The utility model relates to a lift device for a power transformer cooling device, and more specifically relates to a multifunctional lift vehicle for mounting a transformer cooling device. The multifunctional lift vehicle comprises a workbench. The workbench is fixed to a pedestal of the lift vehicle through a lift support. A hydraulic pump piston is hinged to the lift support. A hydraulic pump is equipped with a hydraulic pump pressure release operation rod and a hydraulic pump pressure storage operation rod. Universal wheels are arranged under the pedestal of the lift vehicle. The universal wheels are provided with a locking mechanism. One end, close to the hydraulic pump pressure release operation rod and the hydraulic pump pressure storage operation rod, of the pedestal of the lift vehicle is equipped with a rectangular backboard. A vehicle handle is disposed on the backboard. The multifunctional lift vehicle is convenient to operate, and is simple in structure and flexible in transportation. Only two people are needed to safely and conveniently transport and mount a cooling device that weighs 100kg. Therefore, the multifunctional lift vehicle is time-saving and labor-saving.