The invention discloses a double-drum washing machine, which comprises a first outer drum and a second outer drum which are arranged in a washing machine frame; the first outer drum and the second outer drum are connected through a connecting piece so as to form an integral structure; the first outer drum and the second outer drum which are connected are connected with the frame through shared damping devices; the damping devices comprise a first damping device, a second damping device and a third damping device, wherein the first damping device is connected with the first outer drum and the frame, the second damping device is connected with the second outer drum and the frame, and the third damping device is connected with the first outer drum or the second outer drum and a middle cross beam arranged on the frame. According to the double-drum washing machine disclosed by the invention, the first outer drum and the second outer drum can be damped by the damping devices respectively arranged on the first outer drum and the second outer drum, and therefore the goals that the assembly number of the washing machine is relatively reduced, and the production cost is reduced due to the fact that a set of damping devices is shared by the first outer drum and the second outer drum are achieved; the double-drum washing machine disclosed by the invention is simple in structure, remarkable in effect and suitable for being popularized and used.