Surface　metallization　is　crucial　for　capacitors.　Screen　printed　method　is　usually　adopted　in　the　ceramic　capacitors　with　regular　structure.　However,　core-piercing　capacitor　not　only　exhibits　complex　shapes　with　double-layer　step,　deep　hole,　but　also　requires　to　meet　further　welding.　It　is　a　challenge　to　achieve　the　high-quality　electrode.　In　this　work,　Y5V-type　core-piercing　ceramics　capacitor　has　been　adopted　as　the　research　objects　through　to　electroless　nickel　plating　process　achieve　high-quality　electrode.　The　effects　of　pre-treatment　and　plating　process　such　as　etching,　sensitization,　and　activation　and　reducing　agent　concentration,　pH　value,　plating　temperature　and　plating　time　have　been　systemically　investigated　on　the　microstructure　evolution　and　performance.　The　optimal　pre-treatment　is　etching　in　30　wt%　H2SO4　solution　at　70　°C　for　1.5　h,　sensitization　in　15　g　L−1　SnCl2　solution　and　activated　in　200　mg　L−1　PdCl2　solution　for　3　min,　respectively.　The　best　process　parameters　are　NaH2PO2　concentration　of　25　g　L−1,　C12H25SO3Na　concentration　of　20　mg　L−1　and　pH　value　of　6.0,　temperature　of　70　°C,　time　of　10　min.　After　plating,　the　bright　electrode　is　achieved　for　the　core-piercing　ceramics　capacitor,　which　exhibits　the　microhardness　of　590　HV,　excellent　stability　of　dielectric　properties.　The　low　variation　of　capacitance　is　less　than　9%　and　the　dielectric　loss　is　still　below　0.01　after　two　times　thermal　shock,　from　room　temperature　to　300　°C　to　room　temperature,　corrosion　of　10　wt%　HCl,　10　wt%　NaOH,　3.5　wt%　NaCl　solution.　This　work　provides　an　effective　approach　for　surface　metallization　of　complex　shape　capacitors.　©　2025