Lintel structure for building wall opening

The utility model provides a building wall opening lintel structure which comprises a steel base plate arranged above a wall opening, the steel base plate comprises a bottom plate and a reinforcing rib vertically arranged in the middle of the bottom plate in a full-length mode, the two sides of the steel base plate extend upwards to be bent, and prefabricated building blocks with the same width as a wall are built on the steel base plate; the prefabricated building block comprises a through cavity, a through groove is formed in the middle of the lower portion of the prefabricated building block, the reinforcing ribs extend into the groove of the prefabricated building block, the two sides of the steel base plate are connected with the edges of the prefabricated building block, and adhesive layers are arranged at the joints of the bottoms of the two sides of the prefabricated building block and the edges of the steel base plate for blocking connection. And concrete layers are poured in the prefabricated buildi