The invention discloses a manufacturing method of PE fiber and a rod for a layer-stranding cable, and is characterized in that a PE fiber rod replaces FRP (Fiber Reinforced Plastic) as a central reinforcing piece, aramid fiber is replaced by the PE fiber, and an outer jacket part subjected to heat processing is separated through a process of coating a layer of a polyimide film or a polyimide insulation tape, so that the temperature cannot be higher than the maximum temperature limit of a PE fiber yarn in a manufacturing process. According to the method, advantages of an ultra-high molecular PE fiber yarn and the rod are utilized to reinforce using performance of the cable and avoid damage to the performance of the ultra-high molecular PE fiber yarn and the rod in a high-temperature production process.