The invention provides a film cutting device, and belongs to the technical field of rubber plug production equipment. The film cutting device comprises a frame, a conveying mechanism, a first die mechanism, a second die mechanism, a first cutting mechanism and a second cutting mechanism; the conveying mechanism is used for conveying films from the feeding position to the target position, the firstdie mechanism and the second die mechanism are driven synchronously, and the first cutting mechanism and the second cutting mechanism are both used for cutting the films into the target size; and thefirst die mechanism and the second die mechanism are both used for moving in a reciprocating mode under driving of the conveying mechanism, and the first die mechanism and the second die mechanism are opposite in moving direction. According to the film cutting device provided by the invention, the films are automatically cut, through arrangement of the first die mechanism and the second die mechanism which are driven synchronously and are opposite in moving direction, the films are conveyed and cut continuously, and thus the production efficiency of the films is improved greatly.