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Superphosphate is used as additive to reduce ammonia (NH3), methane (CH4) and nitrous oxide (N2O) emissions during composting, while the availability of phosphorus can be increased. It is an effective way for environmental risk reduction and compost quality improvement. Based on different process parameters significantly influenced pollutant gases production, effects of different aeration rates (AR: 0.12L/(kg·min)，0.24L/(kg·min)，0.36L/(kg·min)), moisture contents (MC: 55%, 60%, 65%) and C/N ratios (15, 18, 21) on CO2, CH4, NH3 and N2O emissions during pig manure composting were studied with superphosphate addition (10% dry matter of initial raw material). The results showed that the nitrogen fixation capability of superphosphate was obviously reduced by AR of 0.36L/(kg·min), and AR of 0.12L/(kg·min) was the best for NH3 emission reduction. With superphosphate addition, it showed an effective control on N2O emission and significant reduction on CH4 production in all treatments. N2O production could be further decreased with AR of 0.12L/(kg·min) during thermophilic phase of pig manure composting. However, CH4 and N2O generations could be promoted with MC of 65%. All process parameters showed no negative effect on compost stability and maturity in 35d composting. During pig manure composting with superphosphate addition, the recommended parameters with the lowest greenhouse effect of CO2, CH4, NH3 and N2O were MC of 60%, AR of 0.12L/(kg·min) and C/N ratio of 18.