The cementation index is an important parameter for calculating water saturation. Its main influencing factors include the following aspects: formation temperature, pressure, formation water salinity, reservoir space type, mud content, wettability, dispersion characteristics, particle shape and size. This article provides a brief overview of the influencing factors and their characteristics and results. The results are: The cementation index of oil wet reservoirs is lower than that of water wet reservoirs. The higher the mud content, the smaller the cementation index. The higher the frequency, the higher the cementation index. The cementation index is influenced by the type of storage space and varies greatly. The larger the content of micropores, the smaller the cementation index. Rock with good pore structure has a lower cementation index. The smaller the pore throat ratio, the lower the cementation index. The cementation index decreases with the degree of particle sphericity, and the m value steadily increases. The smaller the equivalent particle, the higher the cementation index. In addition, the reasons were analyzed and practical application suggestions were provided, aiming to provide reference for the research and analysis of rock electrical experiments and cementation index, in order to obtain accurate cementation index and lay the foundation for accurate calculation of water saturation.