Buried hill X in the intertidal area of Liaohe Depression has undergone multiple periods of structural transformation. The stratigraphic thickness and occurrence stability are poor, and the lithofacies and lithology are complex and diverse, so it is difficult to identify the lithology. The Archaeozoic lithology is a set of metamorphic rock system, mainly developed with mixed granite, mixed gneiss, gneiss and amphibolite. In order to accurately distinguish the lithology of metamorphic rocks, on the basis of analyzing the logging response mechanism of metamorphic rocks and optimizing and constructing the sensitive logging response parameters of metamorphic rocks, three kinds of chart methods, decision tree model and support vector machine model are used. The lithology identification method has carried out the lithology discrimination of the single well in the study area, and the actual lithology comparison results from the drilling coring and logging analysis show that the discriminant coincidence rate of the decision tree model and the support vector machine model is higher than that of the chart method. It provides a feasible method for accurately identifying the lithology of metamorphic rocks in this area.