Sheet body structure and seedling culture cup formed by folding same

The utility model discloses a sheet body structure and a seedling raising cup formed by folding, the sheet body structure comprises four rectangular base sheets and a connecting sheet which are integrally connected, and the connecting sheet is connected to the rectangular base sheet on the rightmost side and can be overlapped with the rectangular base sheet on the leftmost side to be in pressure fit with the rectangular base sheet on the leftmost side; a bottom sealing block is arranged at the bottom of the first surface of each rectangular substrate in a protruding manner; inward folding grooves are formed in the connecting positions of the connecting pieces and the rectangular base pieces and the connecting positions of the multiple rectangular base pieces, and ventilation folding holes are formed in each inward folding groove at intervals in the length direction. The seedling raising cup is formed by folding a sheet body structure and is of a cylindrical structure formed by overlapping a connecting sheet i