Prefabricated sandwich type wall panel

The utility model relates to an improvement of a prefabricated hollow sandwich type wall panel or a prefabricated sandwich type wall panel with a heat-preservation core layer. The prefabricated sandwich type wall panel is characterized in that at least one hollow ventilating channel is arranged in the thickness of a prefabricated sandwich wall body. When a building wall body particularly an external wall is assembled, the ventilating channel is communicated, so as to form a natural ventilating channel inside and outside. Compared with the present prefabricated sandwich type wall panel, the ventilating function is added, so that the prefabricated sandwich type wall panel can realize natural or forced ventilation, thereby well solving the problem of ventilation inside and outside a building room, and improving the indoor air quality without additionally arranging the ventilating channel.