Abstract: At present,the main ventilation network solutions include loop method and node method. The node method has many advantages over the loop method,but it has not been widely used. On the one hand,the fan needs to rely on the nodes to be involved in the network,while the wind pressure description of the fan node and the construction of the node wind pressure equation are complex and difficult. On the other hand,the layout of mine roadways is large,and the combination of nodes and branches with special conditions is diversified,which lead to the difficulty in the construction process of the node wind pressure equation,and it is difficult to realize the algorithm in programming language. To overcome the above two problems,the theory of node method is analyzed and deduced,then the method of fan treat-ment and ventilation network modeling are proposed. Using C# language,the algorithm is implemented and the same numerical example is solved with different network models,and the result method is compared and verified with the loop method. The results prove that the method of fan treatment and ventilation network modeling in the research and development is feasible and can be widely applied,in particular,can deal with the complicated situation in under-ground mines.