The invention discloses an intelligent visual defect detection system of a paper-plastic compound bag integrated machine. The system comprises a printing machine, a paper-plastic compound bag forming machine and an intelligent visual defect monitoring system, wherein the printing machine and the paper-plastic compound bag forming machine are connected through a paper-plastic compound base cloth transportation section for transporting paper-plastic compound base cloth; the intelligent visual defect monitoring system comprises an LED reflector lamp, a camera and a control center, the LED reflector lamp and the camera are located at the horizontal transportation section of the paper-plastic composite base cloth transportation section, the camera is located above the paper-plastic compound base cloth at the horizontal transportation section, a lens of the camera right faces the paper-plastic compound base cloth, the LED reflector lamp is located below the paper-plastic compound base cloth at the horizontal transportation section and right faces the camera, and the camera is connected with the control center through a communication wire. The system is simple in structure and simple to operate and can automatically detect whether the paper-plastic compound base cloth has defects, time and labor are saved, and the risk of missed detection or misjudgment is avoided.