Abstract: The rapid solidification of amorphous ribbons requires the cooling roller to have extremely high cooling efficiency and temperature uniformity. To overcome the problems of uneven heat transfer and stagnation zones in conventional axial-channel cooling rollers,this paper presents a novel cooling roller designed with circumferential channels inside the copper sleeve and a water distribution disc. Using SolidWorks Flow Simulation,fluid-solid coupling models for both the traditional axial-channel design and the new circumferential-channel design were established. A comparative analysis of the internal flow streamlines and temperature distributions under identical boundary conditions were conducted. The results show that the circumferential structure effectively utilizes the centrifugal force generated by roller rotation to enhance heat transfer. Compared with the traditional design,the new design achieves significantly higher average outlet water temperature and internal mean flow velocity,as well as a more uniform circumferential temperature distribution. This design substantially improves the overall heat transfer performance and temperature uniformity of the cooling roller,providing an effective solution for optimizing the amorphous ribbon production process.