通过对不同成熟度煤样（０．５３％～２．１１％）的动力学研究，展示了华北晚古生代煤动力学参数随成熟度由高而低、从低到高的动态演化规律，提出了煤的二次生烃动力学模式．依据该模式，华北晚古生代煤的二次生烃具有一定的阶段性．不同的演化阶段其二次生烃模式不同．初次生烃以后，当煤的镜质组反射率为０．７％～０．９％时，二次生烃高峰提前；若反射率为０．９％～１．３％时，二次生烃高峰滞后；而反射率＞１．３％以后，二次生烃高峰与初次生烃连续． The dynamics of coal samples with different maturity (0.53% ~ 2.11%) shows that the dynamics of Late Paleozoic coal kinematical parameters in North China fluctuated from high to low and from low to high with maturity The Secondary Hydrocarbon Generation Kinetics Model of Coal. According to this model, the secondary gas generation of Late Paleozoic coal in North China has a certain stage. Different secondary hydrocarbon generation modes are different in different evolution stages. After the first hydrocarbon generation, when the vitrinite reflectance of coal is 0.7% ~ 0.9%, the peak of secondary hydrocarbon generation is earlier; if the reflectivity is 0.9% ~ 1.3%, the secondary The peak of hydrocarbon lags behind. After reflectivity> 1.3%, the peak of secondary hydrocarbon generation and the initial hydrocarbon generation are continuous.