Abstract: Traditional manual analysis methods of ventilation network or usual ventilation network solution software used in complex mines with large coal-seam dip angle, complex geologic structure and long mining time have problems of large workload, low efficiency, high error rate, incomplete solution and so on, and cannot well know ventilation safety status of underground roadways real-timely and completely. For the above problems,taking Nantong Coal Mine as a research object, visualized dynamic solution and early warning technology for ventilation network of complex mine was researched from aspects of dynamic solution model and method of ventilation network, measurement of mine ventilation resistance parameters, early warning of abnormal ventilation and visualization of ventilation system according to complex characteristics of the mine ventilation system. A visualized dynamic solution and early warning system of mine ventilation network is developed according to the technology. The applications show that error between solved air quantity of the system and the actual one is less than 10%, and solution results can be displayed real-timely and dynamically. The system realizes precise measurement of mine air speed and air voltage parameters in full range, dynamic solution of whole mine ventilation network and consecutive analysis and early warning of abnormal ventilation.