In this paper, we have studied the temperature dependence of the d. c. conductivity of DLC films. The results show that there are obviously different conductive mechanism in the three tempera ture regions (i.e., low, room and high). In the low temperature region , it agrees with the logσ-T-1/4 rule, while in the room and the high temperature regions, it agrees with the logσ-T-1 rule, but the thermoactive energies and the pre-exponential coefficients are different. The experi-ment results are discussed using the two-phase model.