Dustproof door assembly, power supply track and track socket

The dustproof door assembly comprises a power rail and a rail socket, a plurality of first dustproof doors and a plurality of second dustproof doors are arranged on a dustproof door support in a sliding mode, the first dustproof doors and the second dustproof doors are alternately arranged along a rail insertion opening, and the rail insertion opening is closed under driving of an elastic piece; first linkage structures are arranged on the two sides of the first dustproof door, second linkage structures are arranged on the two sides of the second dustproof door, and the second dustproof door is in one-way linkage with the first dustproof door through the second linkage structures and the first linkage structures in the backward stroke, that is, when the first dustproof door slides back to the side away from a track insertion opening, the second dustproof door is in one-way linkage with the first dustproof door. The adjacent second dustproof door is driven to slide together to be away from the track insertion