The invention relates to a method for selecting a fault line from power distribution network lines based on the data of a PMU (Phasor Measurement Unit). According to the method, an overall average empirical mode decomposition method is adopted to calculate high-frequency energy; a complete data extraction and use flow and a fault line selection system are designed according to the characteristicsof the data of the PMU. The method comprises the following steps that: a local substation uploads high-frequency data during a fault through a sub-station-master station collaborative architecture; the average current amplitude difference of all feeder lines is calculated according to the high-frequency data; EEMD conversion is carried out according to fault recording data provided by the fault recorder of the PMU, so that the high-frequency transient energy of all lines can be calculated; the fault credibility of all the lines is calculated; and a final fault feeder line is determined according to the fault credibility. With the method of the invention adopted, the online selection of the fault line of the power distribution network lines is realized; a modal aliasing effect brought by atraditional modal decomposition method is eliminated; line selection results are more accurate; and the quantitative fault credibility is more direct and clearer. The method is advantageous in adaptive decomposition.