Prefabricated concrete laminated slab bottom plate connected through separated joints

The utility model discloses a prefabricated concrete laminated slab bottom plate with separated joint connection, which comprises at least two prefabricated single plates which need to be laterally sealed and spliced, one side of one of the two adjacent prefabricated single plates is pre-buried with a section of outwards extending cylindrical components at intervals along the joint direction of the two adjacent prefabricated single plates, and the other side of the other prefabricated single plate is pre-buried with a section of outwards extending cylindrical components. A threaded section isarranged at the extending end part of the cylindrical component; a hand hole is correspondingly formed in the seam side of the other second prefabricated single plate and the first prefabricated single plate and located in the extending path direction of the cylindrical component, a through hole is formed in one side of the hand hole cavity, and the through hole is opposite to the cylindrical component and located in the