Particulate matter (PM) from pig farms are pollutants affecting human health and the environmental. The information on this topic is limited in China to date. A one-year study to monitor the dynamics of total suspended particles (TSP), particulate matter with diameter less than 10 μm (PM₁₀) and 2.5 μm (PM_2.5) was conducted in three pig fattening facilities of a commercial pig farm in Beijing, China. The results showed that daily mean indoor TSP, PM₁₀ and PM_2.5 concentrations were 0.34–4.96, 0.15 to 1.01, and 0.06–0.20 mg·m⁻³. The average emission rate (ER) of PM per animal (pig) and livestock unit (LU = 500 kg) was 1.06 ± 0.65 g d⁻¹ pig⁻¹ (11.83 ± 7.07 g d⁻¹ LU⁻¹) for TSP, 0.50 ± 0.39 g d⁻¹ pig⁻¹ (5.53 ± 4.10 g d⁻¹ LU⁻¹) for PM_10, and 0.12 ± 0.17 g d⁻¹ pig⁻¹ (1.42 ± 1.86 g d⁻¹ LU⁻¹) for PM_2.5, respectively. The daily maximum concentrations of TSP and PM₁₀ exceeded the Chinese environmental quality standard for the livestock and poultry farm (NY/T388-1999). The concentration of PM_2.5 in animal house and emissions of PM form animal production have not been regulated in China, it is necessary to focus on mitigation measures to minimize the impacts of PM.