Along　with　the　wide　use　of　XLPE　power　cable　in　the　electrical　power　system,　its　test　engineering　and　test　method　have　been　becoming　more　and　more　important.　The　paper　introduces　a　kind　of　oscillatory　wave　voltage　test　system　based　up　on　oscillatory　wave　theory　and　its　research　status　at　home　and　abroad,　discusses　its　application　in　the　withstand　voltage　test　and　partial　discharge　detection　of　power　cables.　It　is　proved　that　oscillatory　wave　voltage　have　good　equivalence　with　alternating　voltage,　and　compared　with　alternating　voltage　and　very　low　frequency　voltage　(0.1　Hz),　it　has　some　advantages　such　as　shorter　operating　time　and　easier　operation　and　so　on.　It　can　find　most　kinds　of　defects　in　XLPE　power　cable　effectively,　and　dose　no　harm　to　the　cable,　so　it　has　a　good　future.