In order to explore the pollutant emissions of residential coal combustion in Liaoning Province, bituminous coal and briquettes were selected as the research objects to conduct combustion experiments and flue gas emission level monitoring in farmers' homes, quantitatively evaluate the emission factors of different coal types and stoves, and compare the economic costs of different heating modes, so as to provide data support for clean heating policies in Liaoning Province. The results showed that: ① The pollutant emissions of different residential coal differed greatly, and the briquettes had obvious emission reduction effects on NOX
, CO, VOCs and PM, which were reduced by 39.8%, 44.2%, 42.1% and 57.9% respectively compared with bituminous coal I, and the emissions of CO and VOCs were reduced by 14.9% and 27.8% respectively compared with bituminous coal II. ② The type of stove also had a great influence on the emission factor. Compared with floor stoves and standing stoves, the emission reduction effect of eco-friendly stoves was obvious, which reduced 87% and 86% of PM, respectively. ③ In 2020, the SO2
, CO, VOCs and PM emissions of civil coal combustion in Liaoning Province were 4730, 12070, 862950, 6420 and 14740 tons, respectively, of which bituminous coal contributed 88.29% of the total pollutant emissions; In 2020, the emission of bulk coal pollutants in rural areas of Northeast China was 4,826,570 tons, of which CO accounted for the highest proportion, reaching 95.7%. ④ The economic cost of different heating modes were an important factor for residents to consider, which was very important for the promotion of clean heating modes, under the government's subsidies, the economic cost of the combination of heating mode of friendly stoves and briquettes was 1073.99 yuan per year, which was 35% less than eco-heating mode of friendly stoves and briquettes. ⑤ By replacing the existing bituminous coal heating in Liaoning Province with eco-friendly stoves and briquettes heating methods with lower economic costs, VOCs, PM and CO were reduced by about 79.94%, 85.28% and 42.57% respectively. It can be seen that eco-friendly stoves and briquettes are better than traditional stoves and loose coal in terms of emissions and economic costs under the premise of ensuring the quality of briquettes, and the government can promote their use in rural areas with poor economic level.