Automatic vacuum drying device

An automatic vacuum drying device, comprising a drying oven (90), a heating device (80) used to heat the drying oven (90), a vacuum extraction device (70) used to evacuate the drying oven (90), a nitrogen input device used to input nitrogen into the drying oven (90), and a transporting device (60) located inside the drying oven (90) and used to transport materials, two first openings (91) being located at two opposite sides of the drying oven (90), an automatic sealing door (10) being mounted on at least one of the first openings (91), the automatic sealing door (10) including a first door plank (11) and a second door plank (21) parallel to the first door plank (11), an elevator structure (30) being located between the first door plank (11) and the second door plank (21), the elevator structure 30 being used to lift the first door plank (11) and the second door plank (21), at least two articulation elements (41) being located between the first door plank (11) and the elevator structure (30), one end of each articulation element (41) being connected with the first door plank (11), an opposite end of each articulation element (41) being connected with the elevator structure (30), at least two another articulation elements (41) being also located between the second door plank (21) and the elevator structure (30), one end of each another articulation element (41) being connected with the second door plank (21), an opposite end of each another articulation element (41) being connected with the elevator structure (30), a first roller (12) being located at a bottom of the first door plank (11), a first slant surface (13) with left higher than right being located bellow the first roller (12), a second roller (22) being located at a bottom of the second door plank (21), a second slant surface (23) with left higher than right being located bellow the second roller (22).