The calculation models of electric field and temperature field in the continuous graphitization furnace were established. The thermoelectric coupling calculation of the graphitization process was carried out by using the numerical calculation method. Then the distribution of electric field and temperature field in the furnace was obtained. The results show that the heating area of the graphitization furnace is mainly concentrated between the two electrodes. The distribution trends of electric field intensity and current are the same, and the high values of both are distributed near the electrode. The high temperature region is distributed in the middle and lower part of the two electrodes, and the temperature can reach above 2 400.0 ℃. However, the size of the high temperature region is directly related to the electrode parameters. With the narrowing of electrode distance, the high temperature region expands, the temperature peak increases and the temperature raising level increases. With the increase of electrode diameter, the high temperature area expands and the peak temperature increases. With the increase of electrode insertion material length, the high temperature area expands, the temperature peak increases and the temperature raising level decreases.