The utility model relates to a hollow self-air-cooling roller device. The hollow self-air-cooling roller device comprises a roller body, a roller body abdominal cavity which is arranged inside the roller body and a roller shaft which is arranged on two ends of the roller body, wherein a vent pore is formed in the center of the roller shaft, a vent pore which is formed in the right end of the roller body is connected with an assisting fan through an air supply pipeline, the assisting fan is connected with a cold air station through an air supply pipeline, a self-air-cooling device is arranged on the inner wall of the roller body adnominal cavity, and the self-air-cooling device comprises a main fan shell, a main fan cavity which is formed in the center of the main fan shell, main fan blades which are fixedly welded on the inner wall of the main fan cavity, a rotating shaft which is arranged in the center of the main fan cavity, guide fan blades which are arranged on two sides of the main fan shell and a limiting device which is arranged on the outer wall of the main fan shell. The hollow self-air-cooling roller device is convenient to use and reasonable in design; the self-air-cooling device is installed inside the roller adnominal cavity, so that the temperature of the roller and materials can be lowered, the deformation of the materials can be avoided, the material quality can be improved, and the service life of the roller can be prolonged.