The utility model aims to provide a fish scale drying machine to improve the fish scale drying efficiency and reduce the labor intensity of workers. The fish scale drying machine comprises a closed cavity, a net-shaped roller is rotatably installed in the closed cavity through a support, and the roller is connected with a driving mechanism used for driving the roller to rotate. The two ends of theroller are open and extend out of the two ends of the closed cavity respectively, and spiral shoveling plates are arranged on the inner wall of the roller; the fish scale drying machine is further provided with a hot air pipe connected with a hot air supply device, and a hot air outlet of the hot air pipe faces the roller. And a moisture discharge pipe communicated with the outside is arranged atthe top of the cavity. When the roller rotates, the spiral shoveling plates on the inner wall of the roller continuously roll and forwards convey fish scales, in the process, hot air generated by thehot air supply device is blown to the roller through the hot air pipe and penetrates through meshes in the wall of the roller to enter the roller, and therefore the fish scales rolling in the rollerare dried.