Abstract: 8 kinds of minerals common in sedimentary rocks are selected, which are mixed with organics (kerogen) to make pyrolytical experiments, so as to study the influence of minerals on organic pyrolysis. The experiments revealed that of the eight kinds of minerals, quartz, orthoclase, calcites and dolomites have basically no influence on pyrolysis; while kaolinites, illites and montmorillonites appeared to have much influence upon the characteristics of pyrolytic-chromatography, which in comparing with the characteristics of pyrolytic-chromatography from pure kerogen (without adding any minerals), following changes are recognized. 1. rapid decrease in alkene, 2. decrease in macromolecular alkane, 3. increase in small-molecular alkylbenzen, 4. increase in volatile components.