Lithium is a metal element with strong electrochemical activity. It is a new type of energy and strategic resource that is of great significance in the national economy and national defense construction. It is called “the energy metal that promotes world progress”. Lithium brine resources account for about 2/3 of the total global lithium resources. The preparation of lithium products from lithium-containing brines is lower than the cost of preparing lithium products from lithium ore. Lithium-containing brines are getting more and more attention. In recent years, the lithium extraction technology of brine has achieved remarkable innovation and progress, and the lithium-raundering enterprises of brine have also achieved considerable economic benefits.