The invention discloses a valve copper sleeve disassembly method and replacement method, and belongs to the field of equipment maintenance. The valve copper sleeve disassembly method comprises the following steps that a first locking piece, a fixing piece and a hand wheel are removed, the fixing piece is reinstalled on a valve rod, and the fixing piece is enabled to be in contact with a first copper sleeve; a second locking piece is removed, a connecting sleeve is enabled to rotate relative to the first copper sleeve, the first copper sleeve is limited through the fixing piece, and the connecting sleeve is enabled to be separated from the first copper sleeve; and the fixing piece is removed, and the first copper sleeve is enabled to be removed from the valve rod. According to the valve copper sleeve disassembly method, after the first copper sleeve is limited through the fixing piece, the connecting sleeve is enabled to rotate relative to the valve rod so that the connecting sleeve canbe separated from the first copper sleeve; and the disassembly process of the valve copper sleeve can be completed without the aid of other tools or equipment, the effect of being relatively convenient and fast are achieved, and the application range is wide.