Molybdenum is a kind of important inorganic mineral. From the geological point of view, molybdenum powder is the natural mineral of the earth's crust. Molybdenum rods have high melting point, good thermal conductivity and low thermal expansion. At high temperature, it can be antioxidant and has high strength. It can be classified into pure molybdenum bar according to the material (the content of molybdenum is more than 99.95%), high temperature molybdenum bar (molybdenum lanthanum alloy bar), the content of lanthanum is 0.4~1.2%, TZM molybdenum bar. The surface of forging molybdenum rod is allowed to have slight oxide film and hammer marks, the surface of polished molybdenum rods has metallic luster, no oxidation phenomenon, and two surfaces have no defects, such as delamination, crack, burr and vertical crack. The production and processing procedures include forming, sintering, suspension forging, machining. The surface of forging molybdenum rod has a layer of oxide that is black, the surface of polished molybdenum rods has silver gray metallic luster. Molybdenum products have the characteristics of easy oxidation. It needs strong acid (nitric acid, hydrochloric acid fluoride, etc.) to remove severe oxides. Mild oxide uses detergent with soft cloth or sponge, etc. to clean it and then wash it with warm water, the clear molybdenum products will lose the metallic luster. It is used in the production of electric vacuum device and electric light source parts. It is suitable for the processing of the ion injection parts, it is used as the high temperature heating body and the high temperature structural parts. In the glass and refractory fiber industry, it can be used as the electrode of the furnace, it can work in the glass melting with 1300 degrees and has long life. It can be forged, rolled and drawn.