The partial discharge(PD) detection in withstanding voltage test of 110 kV XLPE power cable for a new substation project is introduced.The signal to noise ratio of the detection system is improved and background noise is reduced through shielding resonant system and suppressing resonance
and through setting a filter and detection frequency bands in the PD test system.Testing results verify the effectiveness of the constructed PD test platform and the interference suppression method for on-site PD detection of the cable.