The heat transfer performance of cement is an important factor that affects the heat transfer capacity of the wellbore. This article mainly introduces the current main research methods of cement thermal conductivity， and some understandings obtained from the research， such as the relationship between the addition of high thermal conductivity materials， the cement microstructure and water content， and thermal conductivity. At the same time， it points out that the unification and expansion of the existing research methods and the systematization of research content need to be further strengthened and improved. Based on the analysis of the research experience on porous materials such as building thermal insulation cement and rock， it is proposed that the research on the thermal conductivity of cement not only needs to unify the experimental methods and promote the use of numerical simulation methods， but also consider the curing conditions， the dynamic changes of internal moisture and the influence of external thermal insulation materials， and other factors on cement thermal conductivity. The systematic and standardized research methods and content can effectively improve the accuracy， efficiency and comprehensiveness of the research， and significantly increase the understanding of the thermal conductivity of cement so as to provide a certain reference for subsequent research.