Abstract: Hydrocarbon generation simulation experiment is an important approach in resource assessment and confirmation.The experiment system can be divided into 3 types:open,semi-open and closed.Different system has different advantage and disadvantage,and can be chosen to resolve different problems.The accuracy of reaction temperature,mostly determined by the frame of simulation system,has great influence on the application of experiment results.Experiments of different samples under different pressure in the same simulation system are important for researches of influence of pressure on hydrocarbon generation.