The invention provides a vacuum drying device. The vacuum drying device comprises a vacuum chamber and a bearing table which is arranged in the vacuum chamber and is used for bearing a to-be-treated object, wherein the bearing table comprises a bearing platform, a plurality of supporting parts arranged on the bearing platform, and a moving mechanism which can move the supporting parts. According to the vacuum drying device provided by the invention, the supporting parts arranged on the bearing table can be moved, contact positions of the supporting parts and a substrate can be changed, and the problem that in the prior art, contact points of a display substrate and supporting pillars are badly formed is solved.