The invention relates to a GIS partial discharge location method which is characterized by comprising the following steps: (1) performing ultra-high-frequency partial discharge detection at different positions of a GIS; (2) detecting all acquired ultra-high-frequency detection signals; (3) extracting the waveform durations t of all the detection signals; (4) comparing the waveform durations t of the detection signals at different positions; and (5) determining that the position with minimum t is the position of a partial discharge source. Trials prove that the location method has the following beneficial effects: location can be performed by comparing the durations of different positions according to the durations of ultra-high-frequency partial discharge signals; and the method has the advantages of being simple and convenient, and easy to implement on site.