Double-sided polishing machine and polishing process

The invention relates to a double-sided polishing machine and a polishing process. The double-sided polishing machine comprises a swing arm, a polishing mechanism and a polishing mechanism, wherein the swing arm sleeves the edge of one side of the top of a polishing table; the lap joint limiting plates are detachably installed on the inner wall faces of the two sides of the polishing machining table and located in the center positions of the bottoms of the swing arms; a butt joint rod is movably connected to the inner side wall face of the lap joint limiting plate in a sleeving mode, and after one face of the optical lens is polished, the butt joint rod is used for rotating the rectangular sleeve shell, and the rectangular sleeve shell is overturned upwards. The optical lens is clamped on the inner side wall surface of the rectangular sleeve shell, the closed cover is closed, the triangular elastic soft blocks on the inner side wall surfaces of the rectangular sleeve shell and the closed cover are used for ex