Abstract: With object-oriented c # development tools,one network resolving software is developed based on Windows operating system for mine ventilation system.Based on air-quantity equilibrium law of node of resolved ventilation network,wind-pressure equilibrium law of circuit,ventilation resistance law and cross method,the programmed software is used to carry out the drawing of ventilation network diagram,network resolving,ventilation data analysis and ventilation network optimization adjustment of No.8 Mine of Pingdingshan Coal Group.Combined with network solution,analysis results and optimized transformation plan of ventilation system proposed in mine future production planning,each scheme is resolved finally.According to the comparative analysis of each result,the optimal scheme and the fan model are determined.