Abstract: In order to improve the flexibility and openness of mine ventilation system, the paper proposes that using triangular fight constitutive method to build model in roadway and internal facilities, using triangulation algorithm to process splice, using particle system to simulate dynamic air flow based on OpenGL three-dimensional visualization key technology. The method achieves correct modeling of the roadway splice under complex situations, reduces the complexity of roadway model and splicing algorithm, and innovatively achieves bidirectional query of attribute data and air flow dynamic simulation.