Keel replacement structure of curtain wall unit plate

The invention discloses a keel replacement structure of a curtain wall unit block. The keel replacement structure comprises an upper unit block bottom structure, a base adapter assembly, a unit blockstructure to be replaced and a replacement construction body. The upper unit block bottom structure comprises an upper panel, an upper column, a unit block lower beam and a bottom closing decorative cover plate. The base adapter assembly comprises a keel adapter base and a top closing decorative cover plate. The unit block structure to be replaced comprises a panel to be replaced, a column to be replaced and an upper beam to be replaced. A connecting support is arranged on the column to be replaced, and the replacement construction body is provided with a support adapter assembly. The keel replacement structure ensures the complete waterproof performance of the whole unit system. The unit block structure to be replaced can be directly transported to a site for indoor replacement, saving alarge amount of human and