Downward pressing device and method for adjusting drooping amount of mask plate

The invention relates to the technical field of masks, in particular to a downward pressing device and a method for adjusting the drooping amount of a mask plate. The downward pressing device and the method for adjusting the drooping amount of the mask plate are used for solving the problem that evaporation defects occur in the evaporation technology due to the fact that the mask plate droops in the net tensioning process. The downward pressing device mainly comprises a control part and at least one contact part connected to the control part, wherein the control part is used for controlling the contact part to make contact with the surface of a preset region of the mask plate with the drooping amount to be adjusted and reduces the drooping amount of the mask plate by applying a preset pressure to the contact part; and the preset region comprises a first region, corresponding to a frame structure, in the mask plate or a second region, corresponding to a region between the frame structure and a clamping jaw, in the mask plate. According to the downward pressing device and the method for adjusting the drooping amount of the mask plate, the downward pressing device can reduce or improve the drooping amount of the mask plate by performing downward pressing treatment, and therefore the problem of the evaporation defects of the mask plate possibly generated in the evaporation process can be solved, and the technology yield can be improved.