The invention provides a slide wire rail with built-in copper conductors and a motion power supply system for a cigarette storage cabinet. The slide wire rail is used for supplying electricity to a straight running car. The slide wire rail comprises spare parts of a slide wire rail body, joints, a suspension clamp, a current collector and the like. The traditional condition that a power supply lead is arranged outside is thoroughly replaced with a power supply mode employing coordination of the slide wire rail with the built-in copper conductors and the current collector; four built-in copper conductors are distributed in the slide wire rail body; bayonets and guide rails are arranged at open ends of the slide wire rail body and are used for matched with pulleys of the current collector for motion; a power supply port is connected with the copper conductors; and electric brushes in the current collector are in contact with the copper conductors in the slide wire rail body respectively. By a structured design mode, the topology way of the overall power supply system can be flexibly changed according to the specific usage occasion; and the slide wire rail is widely applicable to various linear and arc dynamic power supply occasions, has relatively high reliability, interpolar insulativity and relatively high insulativity between the built-in conductors and a housing, and can reach the IP44 protection grade.