In this paper, a new polymer process machine--- centrifugal extruder is introduced. The performance of centrifugal extruder has been studied by theoretical analysis and experiments. By the thermodynamic analyses, the mathematic model is founded including the radiation transfer and convection transfer. And the function described the temperature on the surface of the rotor is gotten. So, it is known that the rotation speed is the main influencing factor on the temperature of the surface. According to the experiments, it is known that the design of the experiment equipment can provide enough thermal energy for produce and the mathematic result is fit the experiments’ very well.