The invention relates to the technical field of glass, in particular to glass and a preparation method thereof. The invention discloses glass, which is prepared from the following raw materials in parts by mass: 70 to 80 parts of water, 4 to 5 parts of emulsifier, 2 to 3 parts of n-butyl acrylate, 6 to 7 parts of polymethylhydrosiloxane, 11 to 12 parts of polydimethylsiloxane, 14 to 15 parts of acrylic acid, 10 to 11 parts of polymethacrylate, 1 to 2 parts of tert-butyl hydroperoxide, 25 to 30 parts of polyurethane resin and 4 to 5 parts of lithium sulfate. The invention has the beneficial effects that when a glass body is polished, it can be guaranteed that the glass body cannot move in the polishing process, the polishing quality is guaranteed, meanwhile, an air pump is started, air exhaust operation is conducted on a supporting pipe, therefore, suction force exists on the glass body at the position of a through hole, the limiting effect is better, and in addition, the corners of the glass body can be continuously polished through one polishing head, the whole polishing operation is completed, the polishing efficiency is higher, polishing is more uniform and smoother, and the polishing quality is guaranteed.