Abstract: With the increasing attention on boron resources at home and abroad, the safety supply of boron resources is particularly important in order to prevent the risk of "choking" of boron resources. As the main boron production base in China, Wengquangou, Fengcheng, Liaoning Province, has seen a gradual reduction of boron content in raw ore in recent years, while the stock of tailings is increasing. In order to realize the "boron removal reduction" of tailings, a systematic study was carried out on refractory micro-fine boron bearing tailings from Wengquangou, Fengcheng. The raw ore B₂O₃ contains 5.86%, and exists in the form of bormagnesite (low activity). In order to produce boron chemical materials, the grade of B₂O₃ in the fine grain (-0.038 mm) is 10.37%, and distribution rate is 75.72%. The states of boron are controlled by physical separation and preenrichment or roasting. A boron concentrate with a B₂O₃ grade of 12.56% and a recovery of 64.53% was obtained by physical separation and preenrichment test. At the roasting temperature of 650 ℃ and time of 45 min, the leaching rate of the calcination ore reached 91.56%. In the calcination process, the boronite (Mg₂B₂O₄(OH)(OH)) becomes suanite (Mg₂B₂O₅) due to dehydroxylation, and the boron concentrate has a very fine particle size, which greatly reduces the roasting and leaching time. Therefore, high quality boron chemical materials can be obtained through the process of physical separation and roasting activation.