An apparatus for drop testing is disclosed. The apparatus has a drop angle setting jig that horizontally moves on a support frame and positions a test object at a predetermined angle by clamping with a fixture. The jig provides a second datum plane and is connected to a moveable holding frame, with the holding frame providing a first datum plane. After the fixture clamps the testing object, the jig can be pulled back without touching the testing object, and the testing object stays still. Therefore, the testing object can be precisely positioned. Furthermore, with the sliding track and the stopping block, the jig is able to quickly return back to the reference position.