The invention relates to an adjustable drying device for a papermaking machine. The adjustable drying device for the papermaking machine comprises a drying box and a first fixing disc, a supporting plate is arranged at the lower end of the interior of the drying box, moreover, a paper clamp is arranged on the left side of the upper end of the supporting plate, a partition plate is installed in themiddle of the drying box, moreover, a high-temperature box is fixed at the lower end of the partition plate, and a heating pipe is inlaid inside the high-temperature box. The adjustable drying devicehas the beneficial effects that first rotating cylinders are arranged, and can rotate above the supporting plate so that the paper in the baking process can be rolled, then water in the paper can besqueezed out, the drying efficiency of the paper is accelerated, the situation that the paper is wrinkled and deformed in the drying process, and then the quality of the paper is influenced can also be prevented, meanwhile, supporting rods can drive the first rotating cylinders to rotate on a first rotating shaft, so that the distances between the first rotating cylinders and the supporting plateare adjusted, the distances can be set according to the thickness of the paper, and the situation that due to the fact that the first rotating cylinders press the paper too tightly, damage is caused,or, forward moving can not be performed can be prevented.