Precious metals used in oral prosthetics are alloys with gold as the main body, while containing palladium, molybdenum and other rare metals. Gold alloy as the earliest use of metal materials in dentistry, it has stable chemical properties, strong corrosion resistance, biocompatible performance and a series of other metals can not be compared to the superiority. With the progress of modern technology, the addition of a variety of rare metals, to overcome the original gold alloy strength of the weaknesses, the metal’s various properties are becoming more and more perfect, become the production of oral prosthetics excellent materials. Precious metals are widely used to make inlays, crowns, porcelain restorations and a variety of movable restorative brackets. Precious metal inlays and crown edge anastomosis performance, because it has a natural tooth similar hardness, so it will not make excessive wear on the teeth; precious metal porcelain teeth than ordinary porcelain teeth with more realistic color, while overcoming the easy to chipped porcelain, gingival edge now black and other deficiencies; precious metal bracket because of its good biocompatibility, so that patients wear more comfortable, not easy to cause allergic reactions, especially for sensitive patients. The use of precious metal restorations in China has been somewhat limited due to their high price, but in recent years, due to the improvement of people’s living standards, precious metal restorations have been chosen by an increasing number of patients.