Abstract: Accurate line parameters are the foundation for the safe,economical and reliable operation of distribution network. Due to the structural characteristics of distribution networks,obtaining precise line parameters is not easy. Based on waveform data from primarysecondary integration equipment,a new method is proposed for calculating distribution network line parameters. This method can accurately calculate positive, negative and zero-sequence parameters of distribution lines,including capacitance parameters. The method is suitable for practical scenarios with diverse network nodes and numerous branches in distribution networks,as well as for distribution networks with distributed renewable energy sources. Its calculation accuracy remains unaffected by fault types and load variations. Simulation results demonstrate that its computation results and precision can meet the requirements of power system protection and grid operation.