Prefabricated concrete composite wallboard and composite wallboard assembly

The prefabricated concrete composite wallboard comprises a connecting plate, a concrete wallboard body is arranged in the middle of the connecting plate, and the concrete wallboard body comprises a sound insulation plate, a heat insulation plate, a concrete plate, a steel bar reinforcing plate, a flame retardant layer and a waterproof layer. Grooves with the same width and length as the concrete wallboard body are formed in the inner sides of the connecting plates, and the concrete wallboard body and the connecting plates are fixedly connected through pin holes and pins. The concrete wallboard is provided with the concrete wallboard main body, has the functions of sound insulation, heat insulation, flame retardance, water resistance and the like, can be directly spliced on an installation site, is convenient to transport and use, and ensures the stability of the whole concrete wallboard main body as well as the safety and the convenience in use due to double fixation of the fixing mechanism A and the fixing m