Abstract: The United States is the first country to regulate the emissions from stationary engines in the world. Its stationary engine emission regulations were developed based on the best demonstrated technology (BDT). For stationary compression ignition internal combustion engines (CI engines), the emission regulation was fully harmonized with the non-road mobile machinery and marine CI engine’s emission regulations. The regulation set the exhaust emission standards for engines and also for stationary facilities. Meanwhile, the fuel used by the stationary CI engines was also regulated. Based on the study of the emission regulations, the characteristics of stationary engine emission control policy in the US were analyzed, and the recommendations to develop China’s stationary engine emission standards proposed.