Drying device with humidity adjusting function

The drying device with the humidity adjusting function comprises a box body, a cavity used for drying workpieces is formed in the box body, and an exhaust port communicated with the cavity is formed in the top end of the box body; a material blocking plate is arranged on one side of the exhaust port and slidably connected to the inner top wall of the cavity, and a driving mechanism is arranged at one end of the material blocking plate and used for driving the material blocking plate to slide. During working, a workpiece is placed in the cavity to be dried, water vapor generated during drying can be discharged out of the box body along the exhaust port, water vapor gathering in the cavity is avoided, and the humidity adjusting effect is achieved; the air outlet is controlled to be opened or closed through the material blocking plate, so that the water and steam discharging work of the cavity is controllable, hot air in the cavity is prevented from being lost, and the drying effective degree is improved. Meanwh