The invention relates to an electric power processing device, in particular to an industrialized prefabricated automatic production line for transformer down leads. The production line comprises a pay-off device, a servo conveying mechanism, a real-time interception device, a real-time insulation stripping device, a sorting device, a bending working platform, an air supply system and a PLC control device; the pay-off device is arranged on the leftmost end of the whole production line and matched with the servo conveying mechanism, the servo conveying mechanism is arranged among the pay-off device, the real-time interception device, the real-time insulation stripping device and the bending working platform respectively, and the real-time interception device can intercept cables of different specifications; the real-time insulation stripping device is arrange on the right side of the real-time interception device, the sorting device is arranged on the right side of the real-time interception device, and the bending working platform is arranged on the right side of the sorting device. According to the industrialized prefabricated automatic production line, automation of the whole production process is achieved through the PLC control device, accordingly, the production process is more standardized, the layout is scientific, the process is reasonable, and the working environment is clean and tidy.