Light-proof enclosure structure of bay window

The utility model relates to a lightproof enclosure structure of a bay window, which comprises a top plate, a bottom plate and a side plate, the top plate, the bottom plate and the side plate are all lightproof plate bodies with heat preservation, heat insulation, sound insulation and waterproof functions, each lightproof plate body comprises a pre-pouring plate and a post-pouring plate, the pre-pouring plate and the post-pouring plate are combined together, and the pre-pouring plate and the post-pouring plate are combined together. A heat-preservation, heat-insulation, sound-insulation and waterproof functional layer is arranged between the pre-pouring plate and the post-pouring plate, and the top plate, the bottom plate and the side plates are connected to form a light-proof enclosure. The problems of dust pollution, noise pollution, air pollution, environmental pollution and the like generated in the working procedures are greatly reduced, the workload of supporting formworks on a construction site can be