Abstract: The automatically micro adjustment air volume technology was prompted to make research on the automatically adjusting and controlling mine windscreen device .By summarizing the device component and working principle, the modeling of PID control and characteristic of micro adjustment were analyzed and its’ regulating function was tested by Fluent for mine tunnel air volume. The research result showed that the air volume adjustment by the device was completely without human intervention and it could ensure the air volume requirement of the related access and achieved the micro adjustment by the real-time automatic testing and adjusting to the mine tunnel air volume,which had the advantages of low air volume turbulence and high adjustment accuracy.

Key words: Key words:mine windscreen, automatically micro adjustment air volume technology, air volume turbulence, adjustment accuracy, uniform micro-adjustment