Abstract: Based on the observation of cores obtained from the basement metamorphic rocks in Moliqing fault depression, Yitong basin and guided by geological understandings, the paper uses the conventional logging and FMI logging data to systematically summarize the logging responses and its validity identification method of the lithologies of the 4 types of metamorphic rocks in the area. Effective identification is conducted by using porosity logging and FMI technologies and a method combined with multiple logging charts is proposed for the lithology identification of metamorphic rocks. The identification, calculation and validity analysis are performed for the fractures in the metamorphic reservoir by using FMI and NMR logging technologies, and finally the advantageous lithofacies of the metamorphic rocks are determined in the study area. Logging data from many wells in the study area are evaluated and relatively good results have been obtained, which provides technical support for the exploration of the metamorphic rocks in the area