The invention relates to the field of film cutting, and discloses a film cutter. The film cutter comprises a rack, a controller as well as a film cutting device, a first film feeding device and a second film feeding device respectively mounted on the rack, wherein the first film feeding device and the second film feeding device are respectively arranged at the input end and the output end of the film cutting device; the first film feeding device and the second film feeding device can clamp films, can convey films and can stop conveying films; the film cutting device comprises a film cutting knife capable of moving back and forth and a first driver for driving the film cutting knife to move back and forth; a reciprocating path of the film cutting knife passes through a conveying path, in the film cutting device, of the films; when the first film feeding device and the second film feeding device stop conveying films, the controller controls the film cutting knife to move back and forth to cut films; when the first film feeding device and the second film feeding device clamp and convey films, the controller controls the film cutting knife to stop moving back and forth to stop cutting the films. The film cutter is relatively high in efficiency and can be suitable for online production needs.