Abstract: Disclosed is a production process for slotting an outer conductor of a leaky cable, through which an integrated production line incorporating a metal strap slotting production line, a metal strap longitudinal coating production line and a sheathing production line is provided. A semi-finished product from a leaky cable insulation process is subsequently processed by laser in a numerical control laser cutting device for cutting out corresponding slot holes in a metal strap to produce a slotted outer conductor. Then the slotted metal strap is embossed, and directly coated on an insulator in a longitudinal coating forming mould of the outer conductor. The final sheathing process is completed in a sheath plastic extruding machine to produce a finished leaky cable product. The processes of the outer conductor of the leaky cable, including the raw material punching, the longitudinal coating forming, and the outer sheathing, are finished at one time.