Longitudinal stretching equipment for BOPET film

The utility model discloses longitudinal stretching equipment for a BOPET (Biaxially Oriented Polyethylene Terephthalate) film, and belongs to the technical field of BOPET film production. The conveying device comprises a conveying track and a plurality of chassis, the conveying track comprises a plurality of supporting rods, a square frame and a plurality of rollers, the supporting rods are perpendicular to the ground and jointly support the square frame, the top ends of the supporting rods are fixedly connected with the bottom end of the square frame, and the rollers are rotationally embedded in an inner cavity of the square frame. The two ends of the roller penetrate through the two side walls of the square frame correspondingly, and a first motor is fixedly connected to the ground. According to the longitudinal stretching equipment, through the clamps on the base plates on the two sides of the conveying track, it is guaranteed that the polyester film can be kept in the middle relatively in the stretching