Expandable polystyrene foam plug at end part of prestressed hollow slab

The utility model relates to the field of building components. The utility model relates to a plug, in particular to an expandable polystyrene foam plug at the end of a prestressed hollow slab. The device comprises a blocking column, a base and an inserting shaft, a base is arranged at the upper end of the blocking column, and the base and the blocking column are of an integrated structure. The base and the blocking column are coaxially arranged, and an inserting groove is formed in the middle axis of the blocking column. The inserting groove penetrates through the base and the blocking column, and an inserting shaft is inserted into the inserting groove; four movable grooves are uniformly formed in the outer wall of the blocking column, inwards penetrate through the outer wall of the blocking column and are communicated with the inserting groove; supporting blocks are arranged in the movable grooves; the outer wall of the blocking column is sleeved with a foam pad. The plug adopts anexpandable plug column de