Diamond cutting line, referred to as diamond wire. It is a kind of linear cutting tool, which is made of electroplated metal as binder, and the diamond abrasive is consolidated on the core wire substrate by electrodeposition of metal. Compared with free abrasive cutting method, diamond wire cutting has many advantages, such as thin slice, high efficiency, low loss, energy saving and environmental protection. It is especially suitable for cutting precious hard and brittle materials such as gem, crystal and large size silicon crystal.