Prefabricated wallboard with good heat preservation effect

The utility model belongs to the technical field of wallboards, and particularly relates to a prefabricated wallboard with a good heat preservation effect, which comprises a concrete frame, a concrete layer is fixedly mounted in the concrete frame, a first protection structure is fixedly mounted on one side of the concrete layer, and a second protection structure is fixedly mounted on the other side of the concrete layer. The first protection structure comprises a fireproof layer. According to the prefabricated wallboard with the good heat preservation effect, the first protection structure and the second protection structure are arranged on the two sides of the concrete layer, in summer, external high temperature can be prevented from penetrating through the wallboard to reach a room, the heat insulation effect can be achieved through the first protection structure, the indoor temperature is lower than the outdoor temperature, and therefore the heat preservation effect is achieved; the second protection stru