The electrical conductivity of apatite single crystals along three main crystalline directions wasmeasured in situ using a YJ-3000t multi-anvil apparatus and a combined system consisting of theimpedance/gain-phase analyzer (Solartron 1260) and dielectric interface (Solartron 1296) at 973–1373 Kand 1.0–3.0 GPa. The obtained results indicate that the relationship between the electrical conductivityand temperature conforms to the Arrhenius relation. At 2.0 GPa, the electrical conductivity of apatitewith relatively high activation enthalpies of 1.92–2.24 eV shows a significant anisotropy with anextremely high anisotropic degree (τ = ~8–16) value. For a given [001] crystallographic orientation,the electrical conductivity of apatite slightly decreases with increasing pressure, and its correspondingactivation energy and activation volume of charge carriers are 2.05 ± 0.06 eV and 9.31 ± 0.98 cm3/mol,respectively. All of these observed anomalously high activation enthalpy and positive activation volume values suggest that the main conduction mechanism is related to the monovalent fluorine anion athigh temperature and high pressure. Furthermore, three representative petrological average schemes,including the parallel, Hashin-Shtrikman upper bound, and average models were selected to establishthe functional relation for the electrical conductivity of the phlogopite-apatite-peridotite rock systemalong with the volume percentages of apatite ranging from 1 to 10% at 973–1373 K and 2.0 GPa. Fora typical Hashin-Shtrikman upper bound model, the electrical conductivity-depth profile for peridotitecontaining the 10% volume percentage of apatite was successfully constructed in conjunction withour acquired anisotropic electrical conductivity results and available temperature gradient data (11.6and 27.6 K/km) at depths of 20–90 km. Although the presence of apatite in peridotite cannot explainthe high-conductivity anomalies in western Junggar of Xinjiang autonomous region, it may provide areasonable constraint on those of representative apatite-rich areas.