The invention provides a drilling rod shacking-unshackling combination device, a drilling rod unshackling method and a drilling rod shackling method. The drilling rod shacking-unshackling combinationdevice is used for shacking and unshackling an upper drilling rod and a lower drilling rod. The drilling rod shacking-unshackling combination device comprises a lug plate, a hydraulic cathead and tongs. The lug plate is fixedly arranged and is located at one side of the drilling rod, and an opened hole for fixing a rope is formed in the lug plate. The hydraulic cathead is fixed to one side of thedrilling rod, and the cathead and the lug plate are located at the two sides of the drilling rod respectively. The tongs comprise the upper tong body and the lower tong body, and the lower tong body is fixed to the junction of the lower drilling rod, and is connected with the lug plate through the rope; the upper tong body is fixed to a connector of the upper drilling rod, and is connected with the hydraulic cathead through the rope, and the hydraulic cathead pulls the rope and drives the upper tong body to rotate, so that the connector of the upper drilling rod and the connector of the lowerdrilling rod are shackled and unshackled. Shacking or unshackling work is conducted simply by using one set of the hydraulic cathead as a power source, the equipment cost is lowered, and the operationis convenient simply by controlling one set of hydraulic system.