The thermal conductivity of ordinary epoxy resin was only 0. 2 W/（m·K），which could not meet the heat dissipation needs of high-frequency and high-power electronic devices. Therefore，the development of thermal conductive epoxy resin had become a research focus and hotspot in the industry. Thermal conductive epoxy resins were generally divided into two types. One type was filled thermal conductive epoxy resins，which were thermal conductive composite materials formed by adding high thermal conductivity inorganic fillers to ordinary epoxy resins；another type was intrinsic thermal conductive liquid crystal epoxy resin（LCER），whose thermal conductivity was decided by the presence of micro ordered structures in the resin，which was different from filled thermal conductive epoxy resin. In this paper，the factors influencing the thermal conductivity of intrinsic thermal conductive insulating liquid crystal epoxy resin，common characterization methods，the application of liquid crystal monomer in modified epoxy resin，and liquid crystal epoxy resin with special functions were reviewed. Finally，the development status and trend of liquid crystal epoxy resin were summarized.