Abstract: According to the actuality of insufficient ventilation capacity of Datai Coal Mine,we measured the Coal Mine ventilation resistance and its main ventilator performance,found the main potential of ventilation system,did the analogue simulation of the measured ventilation parameters reliability test and optimization program by Ventsim,provided reasonable reformation measure to the ventilation system.The program has achieved good effect,the main ventilator worked stably,the ventilation resistance of Coal Mine decreased,blast capacity apply can meet the requirement of production,and increased the ability of Coal Mine disaster prevention and resilience.