Abstract: The principle of controllable circulated ventilation is simply introduced.Different from the local circulation ventilation mode, the systemic circulation ventilation successfully was applied into the deep exploration of Hongtoushan mine.The operation situation of the system in Hongtoushan mine is introduced in detail, and the purifying facilities of circulated air and monitoring equipment for harmful gases are built to meet the requirements of underground safety work on circulated ventilation.The system is good, safe and reliable.Difficulties in ventilation and energy saving were solved.

Key words: Deep mining, Systematic circulated ventilation, Contaminated wind purification, Monitoring control