Auxiliary keel structure of integrated ceiling and integrated ceiling

The utility model discloses an integrated suspended ceiling sub keel structure and integrated suspended ceiling, the integrated suspended ceiling sub keel structure comprises a first sub keel section, a second sub keel section and a connecting assembly for connecting the first sub keel section and the second sub keel section, the connecting assembly comprises two outer supporting pieces and a screw assembly, the number of the outer supporting pieces is two, and the screw assembly is connected with the first sub keel section and the second sub keel section. Wherein one outer supporting piece is arranged on the periphery of the first auxiliary keel section in a sleeving mode, and the other outer supporting piece is arranged on the periphery of the second auxiliary keel section in a sleeving mode. Each outer supporting piece corresponds to one set of screw assemblies, and the screw assemblies penetrate through the outer supporting pieces to abut against the outer sides of the wall faces of the corresponding auxi