The utility model relates to a football field
lawn root ventilation and negative pressure drainage
system which comprises a ventilation drainage
pipe network which comprises a
pipe network main pipeline and a plurality of
pipe network
branch pipelines, and the two ends of the pipe network main pipeline are communicated with the pipe network
branch pipelines and an air-water separation well respectively; the air supply and exhaust module comprises a ventilation
air conditioning unit, a ventilation
shutter, an air supply and exhaust main pipeline, a first bypass and a second bypass, the two ends of the air supply and exhaust main pipeline communicate with the air-water separation well and the ventilation
shutter correspondingly, a first air valve and a second air valve are arranged on the air supply and exhaust main pipeline, and one end of the first bypass is connected between the first air valve and the ventilation
air conditioning unit; a third air valve is arranged on the first bypass, one end of the second bypass is connected between the gas-water separation well and the first air valve, the other end of the second bypass is connected between the ventilation
air conditioning unit and the second air valve, and a fourth air valve is arranged on the second bypass. The working condition requirements of air supply, air exhaust and negative pressure drainage can be met by controlling opening and closing of all the air valves.