Ventilation device for coal mining

The utility model discloses a ventilation device for coal mining, which comprises an outer box body, the outer box body comprises an air inlet area, an atomizing and filtering area, a harmful gas reaction area, an oxygen production area and an air outlet area, the air inlet area, the atomizing and filtering area, the harmful gas reaction area, the oxygen production area and the air outlet area are sequentially adjacent, and a through hole is formed between every two adjacent areas. A first fan blade is fixedly installed in one end of the ventilation pipe wall through a first limiting rod, a first motor is installed outside the ventilation pipe wall, a water pump is fixedly installed on the outer side of the bottom of the ventilation pipe wall, the input end of the water pump penetrates through and communicates with the interior of the atomization filtering area box body, and the output end of the water pump penetrates through the outer box body to communicate with a water outlet pipe; the atomization filterin