The invention relates to the technical field of power equipment, in particular to a movable container maintenance powerful ventilating device. According to the movable container maintenance powerful ventilating device, a movable ventilator is arranged on a movable trolley and connected with a flexible ventilating hose through a pipeline, and a hose outlet fixing device is arranged at the other end of the flexible ventilating hose. Due to the fact that the ventilator is arranged on the movable trolley, the power ventilating device can be used for powerful ventilation during container maintenance and can also be used for purging during equipment maintenance. In addition, the movable container maintenance powerful ventilating device is simple in structure, easy to operate, and convenient to maintain; powerful ventilation can be conducted before a worker enters a container or a tank for inspection, cleaning and other maintenance work and during the maintenance work, the personal safety of the worker can be guaranteed, both the working efficiency and the safety of manual operation can be remarkably improved, and meanwhile, the working efficiency is greatly improved. The movable container maintenance powerful ventilating device can be widely applied to maintenance work of containers in the electric power industry and other industries.