采用１３ＣＮＭＲ方法，研究了我国高煤级煤系列样品的碳结构及其演化特征，进而结合电子顺磁共振测试成果对演化的地球化学机理进行了探讨．研究表明：高煤级煤碳结构呈阶跃式和阶段性演化，拼叠作用可能是高煤级煤中—后期阶段煤化作用进展的主要地球化学机理 The 13CNMR method was used to study the carbon structure and evolution characteristics of coal samples from high coal rank in China. Then the geochemical mechanism of evolution was discussed based on the results of electron paramagnetic resonance test. The results show that the structure of high-rank coal is evolved stepwise and stepwise, which may be the main geochemical mechanism of the progress of coal-formation in the high-rank coal