Abstract: By the method of the Rapid Thermal Simulation Experiment,kerogen samples with the D-bacteriodecomposed amorphous solid and B-micrinite contents of 76.50%－93.88% are conducted the experiment.And their hydrocarbon-generating mechanism of thermal evolution and their contribution to hydrocarbon formation are discussed in particular.Experimental results reveal that D-bacteriodecomposed amorphous solid has higher liquid-hydrocarbon producibility and B-micrinite has maximum gas-hydrocarbon producibility.The peak period of hydrocarbon generation for all the experimental samples occurs at the R₀ value of 0.70%-1.00%,and the peak period of gas-hydrocarbon generation slightly lags with the R₀ value of 0.80%-1.00%.As the hydrocarbon components include C₁－C₁₇,hacteriodecomposed amorphous solid and B-micrinite are some major macerals to form natural gas and condensate.