The invention mainly aims at providing a steel wire frame heat preservation prefabricated plate, an assembled overlapped floor and a preparing method of the assembled overlapped floor. The steel wireframe heat preservation prefabricated plate comprises a fine aggregate concrete bottom plate and a steel wire frame, wherein the steel wire frame is formed through bundling of a steel wire net rack and a steel bar truss, and the lower portion of the steel wire frame is embedded in the fine aggregate concrete bottom plate. The steel wire net rack comprises a W-shaped web wire and a heat preservation core material with which the steel wire frame is filled. The assembled overlapped floor comprises the steel wire frame heat preservation prefabricated plate and a cast-in-place concrete overlappinglayer arranged above the steel wire frame heat preservation prefabricated plate. According to the technical problem needing to be solved, the W-shaped web wire can be rapidly bent so that the production efficiency of the steel wire frame heat preservation prefabricated plate can be improved; the W-shaped web wire has triangle stability, the steel bar truss has triangle stability capable of bearinglarge loads, and the assembled overlapped floor good in heat preservation performance and mechanical performance is obtained. According to the steel wire frame heat preservation prefabricated plate,the assembled overlapped floor and the preparing method of the assembled overlapped floor, the production efficiency is high, construction is convenient, materials and manpower are saved, and accordingly the steel wire frame heat preservation prefabricated plate, the assembled overlapped floor and the preparing method of the assembled overlapped floor are more suitable for being used.