A drop test device for testing any deviation between the gravity line of an object and a defined vertical orientation includes a dropping machine and a drop panel installed on the dropping machine. The drop panel includes a support board, a plurality of restriction boards fixed on the support board, a plurality of rollers mounted on the support board and a sliding board positioned on the plurality of rollers for supporting the object. The sliding board is positioned between the plurality of restriction boards and slides on the plurality of rollers. If the gravity line of the object is not on the same line as a supportive strength line of the object, the sliding board moves on the support board and triggers the plurality of restriction boards.