This paper describes calculation results by the developed two-temperature (2T) chemically non- equilibrium (CNE) model for a decaying SF6 arc plasma with transient recovery voltage (TRV) application. The developed model solves energy equations for electrons and heavy particles, mass conservation equations for each of 19 species in SF6 arc plasmas, accounting for totally 122 reactions. Transient distributions of electron temperature and heavy particle temperature as well as CNE composition were obtained for a decaying SF6 arc plasma considering non-equilibrium effects.