Drying device for experiment

The experimental drying device comprises a box body, a box cover, a telescopic ventilation pipe, a draught fan and an air heater, the box cover is arranged at the top of the box body, a supporting plate is arranged in the box body, the supporting plate is driven by a lifting mechanism to slide up and down in the box body, and a plurality of test tube containing holes are formed in the supporting plate; a circle of elastic body is arranged on the inner wall of each test tube containing hole, a plurality of supporting bases corresponding to the test tube containing holes are arranged at the bottom in the box body, a ventilation cavity is formed in the bottom of the box body, connecting holes communicated with the ventilation cavity are formed in the supporting bases, a telescopic ventilation pipe is arranged in each connecting hole, and the lower ends of the telescopic ventilation pipes are communicated with the ventilation cavity. The upper end of the telescopic ventilation pipe extends upwards in the axial di