De-coal process has been not only the significant energy transition path, but also the key result of that. After more than 20 years of efforts, coal consumption in Beijing has been effectively controlled. This study systematically analyzed the dynamic changes of coal consumption in Beijing from 1995 to 2017 and used the LMDI method to decompose the changes in coal consumption from 2005 to 2017. The results showed that: (1) Coal consumption began to decline in 2005, reaching 3.5 million tce in 2017 or a decrease of 84%, which means that the effect of de-coal process was remarkable. (2) In terms of driving factors, except the economic scale effect, the other three drivers had negative effects on the growth of coal consumption. In the early stage of de-coal process, economic structure adjustment played an important role in curbing coal consumption, and the change of energy structure drove the later de-coal process. (3) From the perspective of different sectors, the improvements of energy intensity and energy structure in the sector of electricity and hot water production and supply, and the relocation of metallurgy were the main contributor to the decline of coal consumption in Beijing. (4) Beijing's de-coal process had some reference values for other cities in China, but it cannot be blindly copied because of its own special characteristics.