A power supply device structure includes a casing with a front panel and an insertion port formed on the front panel, an elastic plate installed on an internal side of the casing, and a pull handle with an end pivoted to the casing by a first pivot and the other end pivoted to the movable end of the elastic plate by a second pivot. Both ends of the elastic plate are a fixed end and a movable end respectively, and the fixed end is disposed on an internal side of the casing, and the movable end is protruded from the front panel. A portion of the pull handle is bent into a U-shaped clamp portion which is corresponsive to the insertion port, and the pull handle is pivoted by the first and second pivots, such that the clamp portion is situated at an external side of the insertion port.