Abstract: Scientifically carrying on" daily output determination matched with the fan actual ability", the core is the check and ratify of mine ventilation ability, which is an important assurance and one of the premises that carries out mine safety production. Through the analysis of the problems of the check and ratify method of small mine ventilation ability in Check and Ratify Standard of Mine Ventilation Ability, the suggestion is that regardless of the size of the well type, mine can use the method to check and calculate mine ventilation ability from inner to out. This paper presents a new method to check and ratify mine ventilation ability. The method and content can meet the actual condition of mine safety production.