The invention relates to a cooling medium adjustable roller, which comprises a tubular roller sleeve. Two ends of the inner side of the roller sleeve is provided with an input end, an output end and a swivel joint interface respectively; the two ends of the roller sleeve are also provided with an input end flow regulating valve and an outlet end flow regulating valve respectively; through holes uniformly distributed are drilled on the tube wall of the roller sleeve along the axial direction; a medium flows to the circumferential through holes through an axial central hole; an input end flow regulating device and an outlet end flow regulating device can simultaneously regulate the flow of the medium; and the outlet end flow regulating device can be independently regulated so as to fulfill the aims of cooling the medium to regulate the surface temperature of the roller and ensuring the surface temperature balance of the roller. Compared with the fluid cooling roller of the prior art, the surface temperature balance, abrasive resistance and service life of the roller are obviously improved; in addition, the cooling medium adjustable roller is difficult to break so as to further improve the usability of the roller; and therefore, the cooling medium adjustable roller has more obvious improvement on both aspects of economic value and use value.