QMJ350 automatic bridge grinding and polishing machine is mainly used for granite, marble plate surface grinding, polishing, and can also be used for grinding and polishing terrazzo, artificial marble, artificial granite plate surface. This machine adopts the advanced grinding technology, module in high speed rotating around its own axis at the same time also swing, make the surface grinding and grinding stone is always a line contact, cooling water is sprayed into the debris is easy, easy to discharge, grinding and polishing efficiency is high, the service life is long and so on characteristics of grinding head. The machine has the advantages of convenient operation, safety, high degree of automation, large working table, electrical system adopts programmable controller, low failure rate. The machine working surface is provided with a tilting plate unloading mechanism, is conducive to the plate loading.