Abstract: Fluorite mine in Inner Mongolia is a kind of fine-grained fluorite mine with quartz.By the research on the fluorite ore character and mineral processing tests,a best technology are determined,which consist of one weak alkaline roughing and seven weak acidic cleanings、roughing and cleaning Ⅰtailings discarded as a final tailing,and middlings sent back together to cleaning Ⅰ.By adding collector YSB-2 to cleaning Ⅲ at low temperature, the flotation result which is similar with at room temperature can be obtained. And the high-quality close circle fluorite concentrate can be obtained with CaF₂ of 98.34%,recovery of 87.42% at 15℃,and the second-grade fluorite concentrate can also be obtained with CaF₂ of 97.70% at 5℃.