Based on local ventilation theory research and field practice, a local ventilation management method based on local fan power supply management and focusing on air duct management was proposed to realize remote ventilation of local fan. Research showed that the "three specialties" were the necessary conditions and effective methods for reliable power supply, and the management of the air duct was the main factor to achieve long-distance air supply. Through a series of effective air duct management measures, the problems of high air leakage rate, large cornering resistance and head damage were effectively solved, the sufficient and stable air supply volume of the local fan was realized.