The invention discloses a dual-rail for an automatic building delivery system, and belongs to the technical field of logistics. The dual-rail comprises two vertical rail parts arranged and fixed in the vertical direction of a building; the two vertical rail parts are matched with a delivery trolley, so that the delivery trolley can run in the rail directions of the vertical rail parts; transitionrail parts are arranged between the two vertical rail parts; and the two ends of each transition rail are connected with or separated from the two vertical rail parts. According to the dual-rail for the automatic building delivery system, the purpose that the delivery trolley ascends at one vertical rail part and moves to the other vertical rail part through one transition rail and thus goods areautomatically delivered to various floors is realized.