The invention discloses an oil drum carrying attachment for a forklift. The oil drum carrying attachment comprises a vertical frame, a first clamping arm, a second clamping arm, a first supporting fork, a second supporting fork, a first driving mechanism, a second driving mechanism and a third driving mechanism. A first pallet fork sleeve and a second pallet fork sleeve are arranged on one side of the vertical frame. The first clamping arm and the second clamping arm are both located on the side, away from the first pallet fork sleeve and the second pallet fork sleeve, of the vertical frame and mounted on the vertical frame. The first clamping arm and the second clamping arm are driven by the first driving mechanism and the second driving mechanism respectively. The vertical frame is provided with a supporting fork telescoping channel located below the first clamping arm and the second clamping arm. One end of the first supporting fork and one end of the second supporting fork both penetrate through the supporting fork telescoping channel and are driven by the third driving mechanism. According to the oil drum carrying attachment, through mutual cooperation among the vertical frame, the first clamping arm, the second clamping arm, the first supporting fork, the second supporting fork, the first driving mechanism, the second driving mechanism and the third driving mechanism, the oil drum carrying stability is improved, and the service life of the oil drum carrying attachment is prolonged.