To regulate the thermal conduction performance of TATB-based polymer bonded explosive(PBX), the effects of graphite coating way(inner-coating and outer-coating), temperature and graphite content on the thermal conductivity of TATB-based PBX were investigated by a laser thermal conductivity apparatus.The thermal conduction mechanism of TATB-based PBX was analyzed by Agari model.Results show that the addition of graphite with high thermal conduction performance can improve the thermal conduction performances of TATB-based PBXs under room temperature, and the thermal conductivities of TATB-based PBXs with 1%(mass fraction) inner-coating and 1% outer-coating graphite are 0.572 W·(m·K)^-1and 0.697 W·(m·K)^-1, respectively, revealing that the outer-coating graphite way is better than inner-coating.Compared with the TATB-based PBX without graphite, thermal conductivities of TATB-based PBXs with 1% inner-coating graphite and 1% outer-coating graphite increase by 4.76% and 27.66%, respectively.With the increasing of temperature, the thermal conductivities of TATB-based PBX and its formulations modified with graphite gradually decrease.With increasing the graphite content, thermal conduction performances of TATB-based PBXs modified with outer-coating graphite increase.The 2%(mass fraction) outer-coating graphite can make the thermal conductivity of TATB-based PBX increase to 0.786 W·(m·K)^-1.The thermal conduction mechanism of TATB-based PBX and formulation modified with inner-coating graphite accords with the series model, whereas the thermal conduction mechanism of formulation modified with outer-coating graphite is between series model and parallel model.