Fabricated thermal insulation roof

The utility model relates to an assembly type heat preservation roof which comprises supporting steel, a bearing plate arranged on the supporting steel and a plurality of prefabricated heat preservation plates arranged on the bearing plate, and each prefabricated heat preservation plate comprises a heat preservation plate body and a prefabricated mortar layer arranged on the outer layer of the heat preservation plate body. The outer sides of the prefabricated mortar layers of the prefabricated heat preservation plates located on the edge portions extend out of the outer sides of the heat preservation plates or are flush with the outer sides of the heat preservation plates, and the two sides of the prefabricated mortar layers of the prefabricated heat preservation plates except the edge portions extend out of the two sides of the heat preservation plates correspondingly. A cavity area is formed between the adjacent prefabricated heat preservation plate and the bearing plate, a heat preservation fixing strip is