Abstract: The new wire materials of bundled insulated conductors with two, three and four cores were studied under the guidance of scientific documents abroad. The developed wire materials have the properties of simpler craft, less material and longer life in comparison with the related foreign products. The two power supply modes for low-voltage distribution network were designed and implemented based on the characteristics of the new bundled insulated conductors. One model is with four-core bundled insulated conductors in three-phase transformer, which has been functioning safely in Shenyang of Liaoning rovince for seven years, and the other is with the three-core bundled insulated conductors that two cores act as lines, and one core acts as neutral in a single-phase transformer, which has been running safely for four years in Chifeng of Inner Mongolia Autonomous Region. The outcome of this research will make a new way for the construction and improvement of our rural low-voltage distribution network in the future.