Underground building anti-floating structure

The utility model relates to an underground building anti-floating structure. The bottom face of a bottom plate of an underground building is located on the water table. The underground building anti-floating structure is characterized in that the anti-floating structure comprises a drainage blind ditch which is formed around the underground building is included, the drainage blind ditch downwards extends and is communicated with a permeable layer where the water table is located, and water is directly drained into the permeable layer. Accordingly, the anti-floating problem of the underground building is solved, and compared with an original anti-floating structure, the underground building anti-floating structure has the advantages of being low in construction cost, convenient to construct, good in anti-floating effect, and the like.