Quaternary dominant oil-rich sunken lacustrine facies high-quality hydrocarbon source rock prediction method and device

The invention relates to a method and device for predicting high-quality hydrocarbon source rocks of a'quaternary dominant 'oil-rich sunken lacustrine facies, and the method comprises the following steps: obtaining whether the interior of a sunken part has a'strong fault sinking' condition or not based on the analysis and judgment of the activity rate of a controlled-sinking fault and the settlement rate of a substrate; on the basis of the source-to-concave ratio, the ratio of the concave sedimentation rate to the deposition rate and analysis and judgment of main developed muddy fine-grained sediments in the concave, whether the concave has a moderate shielding condition or not is obtained; on the basis of analysis and judgment on the index of 4-methylstane and the average value of the content of total organic carbon (TOC), whether the interiors of the pits have eutrophication conditions or not is obtained; on the basis of analysis and judgment on the average earth heat flow value of the sunken area or the lo