Abstract: In order to study the relationship between coal consumption and economic growth in Beijing-Tianjin-Hebei, the paper constructs decoupling model to dynamically reflect the time evolution characteristics of the relationship between them. On this basis, LMDI is used to analyze the impacts of coal consumption in Beijing-Tianjin-Hebei. The result shows that the regional decoupling relationship between coal consumption and economic growth is weak decoupling for long. Among them, Beijing has realized the transition from weak decoupling to strong decoupling, Tianjin is still in weak decoupling state, Hebei has gradually realized the transformation from expanding connection to weak decoupling. Among the factors affecting coal consumption, economic growth effect is the leading factor for coal consumption increase in all regions. Both energy intensity effect and energy structure effect restrain local coal consumption. And industrial structure effect is gradually changing from coal consumption driving factor to restraining factor, the mode of action varies from place to place.