The invention provides a highly-conductive temperature rise-resisting copper-aluminum interface alloy composite tubular bus bar and belongs to the technical field of metal tube members. The highly-conductive temperature rise-resisting copper-aluminum interface alloy composite tubular bus bar comprises a composite tubular bus bar body. The outer layer of the composite tubular bus bar body is a copper layer and the inner layer is an aluminum layer, and the inner circle surface of the copper layer and the outer circle surface of the aluminum layer are combined together; the outer circle surface of the copper layer is uniformly provided with a plurality of heat dissipation fins in the circumferential direction; the heat dissipation fins are located in the axial direction of the composite tubular bus bar body; the outer circle surface of the aluminum layer is axially provided with a plurality of protruding ribs distributed uniformly in the circumferential direction; the inner circle surface of the copper layer is provided with grooves matching the protruding ribs. The problems of poor conduction performance, high manufacture cost and poor high temperature resistance of conventional bus bars are solved.