Roller drum and detection device

The utility model provides a roller drum and a detection device. The roller drum comprises a drum main body of which the two ends are opened, and rolling discs fixed at the two ends of the drum main body and driven by driving devices, wherein mounting holes communicated with the openings at the two ends of the drum main body and used for fixing a container holding both a detected object and a magnetic bar are formed in the rolling discs. Through the fixing of the container holding both the detected object and the magnetic bar on the rolling discs, the driving devices drive the rolling discs to roll, the container rolls along with the rolling discs, accordingly, the detected object and the magnetic bar in the container can be fully mixed, the detected object containing a magnetic foreign object is completely absorbed on the magnetic bar, and therefore, good detection effect and high detection efficiency are achieved.