Coaly graphite is an associated mineral resource occurrence at coal measure that transformed from coal during tectonic-magmatic events. The series naturally graphitized coals from anthracite to coaly graphite and their associated roof rocks， floor rocks， and partings of the Hanpo'ao mining area， central Hunan Province， were studied by using X-ray diffraction， clay mineralogy， combining with the metamorphic mineral assemblage characteristics， vitrinite reflectance geothermometer， and Raman spectroscopic geothermometer. The purpose was to study the minerogenetic temperature of these series naturally graphitized coals. The results show that in the early stage of large-scale magmatic intrusion， the heating temperature of coal and its country rocks is relatively high， but the duration is short， whereas the graphitization process of coal and the metamorphism process of country rocks are relatively slow， thus， the thermodynamic equilibrium temperature between coaly graphite and its country rocks is relatively low. The metamorphism conditions of the series naturally graphitized coals from anthracite to coaly graphite cannot be well constrained by a single approach， and the minerogenetic temperature of these series naturally graphitized coals should be calibrated by mineralogy， coal petrography and Raman spectroscopy. Metamorphic minerals such as andalusite and staurolite have been observed in the surrounding rocks of coaly graphite， indicating that coaly graphite is in the medium-grade metamorphism zone， but andalusite and staurolite have been changed into sericite by hydrothermal alteration in the later stage. The metamorphic temperature of anthracite is about 220~250 ℃， meta-anthracite is formed at 330~370 ℃， and the metamorphic temperature of semi-graphite and coaly graphite in the Shixiangli Mine are determined at 390~450 ℃ and 500~550 ℃， respectively. The metamorphism of the series naturally graphitized coals is at medium-to-low metamorphic stage. The results can provide scientific guidance for exploration and exploitation of the coaly graphite.