Boron carbide has been widely used as a new material with excellent mechanical properties, irradiation self-resettable properties and neutron absorption ability. Since the first successful synthesis of boron carbide in the early 20th century, in the past 100 years, with the development of technology, the synthesis technology of boron carbide has not only been limited to the original element synthesis method, but also with the selection of raw materials, sintering process, reaction time and other technologies, the preparation methods of boron carbide powder have been diverse.