Abstract: To research the air quality of the scaled pig farm and evaluate the influence of the air quality on animal and human beings’health, the experiment adopts the environmental detection method to get the statistics about the air quality of sucking piglets pens,nursery pens and fattening pens. The experiment shows that in the pigs houses the average total bacteria amount of the pigs’houses in four seasons are 118.77×10³,28.51×10³,102.04×10³,62.71×10³ CFU/m³.The concentration of NH₃ in four seasons are 9.67,10.87,9.95,12.74 mg/m³.The concentration of H₂S in four seasons are 2.81,1.95,2.68,2.78 mg/m³. The total bacteria amount of outside the pigs’houses in four seasons are 13.57×10³,13.20×10³,16.70×10³,11.85×10³ CFU/m³. The concentration of NH₃ are 1.01,1.44,1.07,0.42 mg/m³. The concentration of H₂S are 0.06,0.08,0.03,0.01 mg/m³. The total amount of bacteria in four seasons are the spring＞autumn＞winter＞summer(P＜0.05). The total bacteria count inside the house are bigger than that outside the house(P＜0.05). The total amount of bacteria in four seasons are all beyond the national standard except the summer. The concentration of NH₃ and H₂S are within the national standard.The temperature, relative humidity and wind speed are within the national standard.

Key words: scaled pig farm; air quality; ammonia; hydrogen sulphide; bacteria counts