Abstract: Central parallel ventilation system and ventilation network of mine shaft bottom area is complex.Extremely uneven of natural distribution air volume is caused because of the occurrence of angle connection roadway in ventilation system,which result in unsteady wind in electrical chamber and nearby roadway of main shaft bottom area.Independent ventilation reliability of mine wings is greatly reduced.There are significant risks of high temperature in part of the electrical chamber and unreasonable system,etc.through the optimal modification of coal mine ventilation network,the propose of reducing temperature,diminishing resistance,distributing air volume reasonably is achieved,which eliminate the hidden dangers of mine and guarantee ventilation safety of coal mine.