The invention discloses a dropping device for drop tests of hazardous articles. The dropping device comprises a hook, a sliding sleeve, a pulling rope ring, a hanging plate, a pulling rope, a lifting bolt, a rope winding pulley, a pulley shaft and a pin. The hook is connected to the middle of the hanging plate through the pin. The sliding sleeve is a sleeve with the cross section in the shape of double-hollow square blocks. The sliding sleeve can slide up and down when sleeving the hanging plate. The circular pulling rope ring is welded on the sliding sleeve. The rope winding pulley is connected to the hanging plate through a bearing and the pulley shaft. The lifting bolt is mounted on the upper portion of the hanging plate to serve as the lifting point of the whole device. The dropping device is simple in structure and convenient to use; during the tests, the sliding sleeve moves to the bottom of the hanging plate to lock the upper portion of the hook, a sample is hung on the hook, the pulling rope is tied to the pulling rope ring, falls to the other side of the hanging plate after being wound around the rope winding pulley, is pulled downwards when drop of the sample is needed and drives the sliding sleeve to slide to the upper portion of the hanging plate, the hook is free from restriction of the sliding sleeve at this moment and rotates around the pin under the action of gravity of the sample, and the sample drops in the air to complete dropping.