Abstract: Based on GIS fuzzy comprehensive evaluation theory, according to the all measured the ventilation state parameters, the paper objectively determines each of the weights of evaluation factors by using variation coefficient method. Taking the west well ventilation system as an example, the comprehensive evaluation results of current mine ventilation state is good; the fan air volume, static fan can meet the demand. The model is applied to evaluate ventilation condition of each tunnel ventilation state, and grasping the safety status of each tunnel ventilation and quality.