Mask film pasting method and device and storage medium

The invention discloses a mask plate film pasting method and device and a storage medium. The mask plate film pasting device comprises a base, a film layer assembly and a positioning mechanism, and a mask plate is detachably connected to the base; the film layer assembly is arranged on the base, positioning holes with outward orifices are formed in the circumferential direction of the film layer assembly, and the positioning holes extend in the horizontal direction; a glue containing cavity is formed in the film layer assembly, a first through hole and a second through hole which are communicated with the glue containing cavity are formed in the top and the bottom of the film layer assembly respectively, and the second through hole is arranged corresponding to the position of the mask plate; the positioning mechanism is arranged on the base, detachably connected with the film layer assembly through the positioning hole and used for driving the film layer assembly to ascend and descend relative to the mask pla