The invention discloses a closed dust removal method and system for a tunneling working face, comprising a press-in fan, a press-in fan, a metal frame gauze, an atomizing nozzle, a dust removal fan and a draw-out fan; the press-in fan forms The air flow is blown out through the press-in type blower to form an air curtain that can close the entire working section of the roadway, and at the same time blow the dust to the other side of the roadway; the atomizing nozzle and gauze mesh cooperate to form a dust control water curtain on the other side of the roadway The gauze and the extractor fan are connected to the dust removal fan. Under the action of the dust removal fan, the dust in the dust accumulation area is sucked into the extractor fan from the dust collection hood, and then enters the dust removal fan for purification. The design method of the present invention is simple and practical, easy to operate, less maintenance workload, does not hinder the normal operation of on-site personnel, the dust removal efficiency exceeds 96%, and the dust removal effect is good.