The Nieèr Co Mg borate deposit is a Mg borate deposit discovered recently. The authors studied regional geological data and geological features of the deposit, compared this deposit with other borate deposits in China and abroad, analyzed the source of ore-forming materials and metallogenic mechanism, and summarized the metallogenic pattern. The Nieèr Co Mg borate deposit formed in the upper-middle Holocene; its host rocks are mainly divided into three horizons: the upper and middle ore-bearing horizons are dominant minable horizons and the lower ore-bearing horizon is a subordinate ore-bearing horizon. The ore types include kurnakovite granular aggregates, mirabilite-bearing kurnakovite, beehive/massive pinnoite and mixed ore type.