Prefabricated bay window component and mounting method

The invention discloses a prefabricated bay window component and an installation method, the prefabricated bay window component comprises an upper bay plate, one end of the upper bay plate is provided with a first vertical plate extending downwards, and the first vertical plate is provided with a first embedded part used for being connected with the upper portion of a floor; a second vertical plate extending upwards is arranged at one end of the lower floating plate, and a second embedded part used for being connected with the lower portion of the floor is installed on the second vertical plate; and two ends of the transverse plate are respectively connected with the first vertical plate and the second vertical plate. By means of the prefabricated bay window component, the bay window can be prefabricated in a factory while wall concrete is poured, finally the prefabricated bay window component is installed on the floor, and compared with a cast-in-place reinforced concrete bay window, the construction period