Sealing plate tool and prefabricating mold

The utility model discloses a sealing plate tool and a prefabricating mold. An avoiding hole is formed in an outer plate mold of the prefabricated mold; the sealing plate tool comprises a sealing cover plate and a locking structure; the inner side surface of the sealing cover plate is used for abutting against the outer side surface of the outer plate mold and is used for covering the avoiding hole; the locking structure is used for fixing the sealing cover plate to the outer side surface of the outer plate mold. According to the technical scheme, the blocking strength of the receding hole is improved, and the phenomenon of slurry leakage at the receding hole is improved. 本实用新型公开一种封板工装及预制模具。预制模具的外板模设有避让孔；封板工装包括封盖板和锁紧结构；封盖板的内侧表面用于抵接于外板模的外侧表面，并用于盖设于避让孔；锁紧结构用于将封盖板固定于外板模的外侧表面。本实用新型技术方案提升了对避让孔的封堵强度，以改善避让孔处漏浆的现象。