This application relates to a processing technology of a contact seat, which includes the following steps: S1, material preparation; S2, rough machining of turning: rough machining of cylindrical holes; S3, numerical control turning: boring of cylindrical holes and turning of the first ring by CNC lathe groove, the second annular groove, the third annular groove, the fourth annular groove and the fifth annular groove; the CNC lathe includes a turning mechanism, a support, a material receiving box, an oil receiving tank, an oil outlet pipe and a lubricating oil pipe; one end of the oil outlet pipe is provided with The filter device and the cooling device, the filter device includes a filter box, the filter box is connected with the oil outlet pipe, the cooling device includes a cooling box, the filter box is connected with the cooling box, and the cooling box is connected with the lubricating oil pipe; S4, machining center: processing the first A through hole, a second through hole and a threaded hole; S5, electro-engraving; electro-engraving at a designated area at the end of the second annular groove close to the first annular groove; S6, silver plating: plating the fifth annular groove Silver treatment; S7, packaging. This application facilitates the treatment of lubricating oil.