Packaging box film laminating machine with defect detection function

The utility model relates to a packing box film laminating machine with a defect detection function, which comprises a film laminating machine frame and a detection box, one end of the upper surface of the film laminating machine frame is fixedly connected with the detection box, the upper end of the interior of the detection box is provided with a sliding groove, one end of the interior of the sliding groove is provided with a motor box, the interior of the motor box is provided with a motor, and the motor is connected with the detection box. One end of the motor is in transmission connection with a threaded lead screw, the surface of the threaded lead screw is in threaded connection with a sliding block, an infrared flaw detector is fixedly installed at the lower end of the sliding block, and an alarm is arranged at one corner of the upper end of the detection box. During use, the motor drives the threaded lead screw to rotate so as to drive the sliding block in threaded connection with the surface of the t