Drop hammer impact testing machine

The utility model discloses a drop hammer impact testing machine which comprises a machine body, an adjusting seat, a spare hole, a thread bushing, a bearing, a stud, a support and an adjusting device, a circular level gauge is fixed on the machine body; a plurality of cross-shaped strips are arranged on the surface of the circular level meter; the inside of the circular level meter is filled with protective liquid; bubbles are arranged in the circular level meter; the adjusting stud is driven to ascend and descend by rotating the threaded sleeve, so that the height of the machine body is changed, and the height change of the machine body can be conveniently known by observing the position of the bubble between the cross strips in the adjusting process, so that the levelness of the machine body is conveniently adjusted; through the arrangement of the spare hole, when the thread bushing or the stud is damaged, a screw is screwed into the spare hole, the screw can be used for replacing a support to support the