Abstract: High-purity quartz sand is the basic raw material for high-tech industries such as microelectronics， optical fiber communication， and aerospace， having an important strategic position in the development of the national economy. At present， the preparation of high-purity quartz sand can be through chemical synthesis， natural crystal processing and deep purification of quartz minerals. Among them， the preparation method by chemical synthesis and natural crystal processing is restricted by raw materials， cost， yield， and so on， which are difficult to be industrially applied in large scale.Therefore， preparing high-purity quartz sand through quartz mineralswill be the main research direction in the future. However， the related researches in China were started late and insufficient. The technologies were monopolized by developed countries for a long time. So，the high-purity quartz sand market ofour country is heavily dependent on imports. Based on the analysis of raw materials， this paper compares the mineral properties of different quartz ores used to prepare high-purity quartz sand are comprehensively compared. It is concluded that granitic pegmatite and vein quartz are the most ideal raw materials for the preparation of pure quartz sand. The types of accompanying gangues and the existing and attached states of common impurity elements such as Al，Fe，Ca and K in quartz minerals are systematically analyzed，especially the lattice impurities and inclusion impurities. It is pointed out that the lattice impurities difficult to be removedis the main factor restricting the quality of high purity quartz sand.From the perspective of mineral processing， the current high-purity quartz sand processing technologiesare divided into four categories according to the different processing purposes.Moreover，the production process status are summarized andanalysised in detail， which highlights the shortcomings of current craftsmanship and the gap with international advanced technology.On this basis， the problems existing in the production and the future research directions of high-purity quartz sandare proposed， which provide some theoretical guidance for the related research in the future.

Key words: High-purity quartz sand, Purification, Materials, Granitic pegmatite, Vein quartz, Technologies and processes