For the analysis of a mine ventilation network by computer, the ventilation network must be digitalized firstly. The digitalization of a complex mine ventilation network is a very strenuous job. With the need of calculation of environmental prediction for a warm mine, it will become much more onerous. Without the aid of computer technology, it would be very difficult to avoid the mistakes in digitalizing this ventilation network. This paper introduces an approach in detail to digitalize the ventilation network of a complex and warm mine, and develops a series of Excels sheets with Visual Basic Application programming technology. These sheets are quite convenient for use and can make the mistakes least in the process of digitalizing the ventilation network of a complex and warm temperature, thus the correctness of analysis of the ventilation network can be ensured.