Based on conventional logging data, this paper uses mathematical model and log curve fitting analysis as the main means to carry out logging evaluation of shale gas reservoirs. The study takes shale gas in the Nanchuan block as an example, considering the influence of geological differences between overpressure gas layers and normal pressure gas layers,an interpretation model was established for different structural types (anticline zone and slope zone) for the first time, Considering the adverse effects of conductive minerals such as pyrite on the resistivity saturation method, a non-electrical saturation model is used; Interpretation model of shale mineral composition, organic carbon content, porosity, gas saturation, adsorbed gas content, free gas content, total gas content, and brittle mineral was established in this paper. The accuracy of the model and the practicability of the method are verified by comparison with experimental analysis data and interpretation of actual well processing, and It is being promoted and used in gas fields.