Abstract: In order to optimize the extrusion process of a new type of aluminum alloy communication radiator, the extrusion test of 6061-0.3Ce aluminum alloy communication radiator containing rare earth was carried out with different extrusion temperatures, extrusion speeds and extrusion ratios, and the thermal conductivity was tested and analyzed. The results show that with the increase of extrusion temperature from 350 ℃ to 475 ℃, extrusion speed from 2 m/min to 7 m/min and extrusion ratio from 16 to 26, the thermal conductivity of the sample first increases and then decreases. When the other process parameters remain unchanged, the thermal conductivity of the specimen increases by 28.48% at extrusion temperature of 425 ℃ than that of the specimen at extrusion temperature of 350℃. The thermal conductivity of the specimen increases by25.31% at extrusion speed of 4 m/min than that of the specimen at extrusion speed of 7 m/min. And the thermal conductivity of the specimen increases by 22.29% at extrusion ratio of 24 than that of the specimen at extrusion ratio of 16. The optimum extrusion temperature, extrusion speed and extrusion ratio of 6061-0.3Ce new aluminum alloy communication radiator are425℃, 4 m/min and 24, respectively.