Concatenation floor unit and bottom plate thereof

The utility model relates to a floor field especially relates to a concatenation floor unit and bottom plate thereof. The bottom plate is the rectangle, and the bottom plate is including upper surfaceand the lower surface of prescribing a limit to its thickness, still including lieing in its marginal portion all around, one of them has do not seted up the draw -in groove to relative marginal portion punishment, and the opening of draw -in groove is towards the lower surface, from one of them of bottom plate to relative marginal portion punishment do not outwards extend a plurality of pothooks, the hook portion of the end of pothook extends up, thereby the pothook be suitable for with adjacent bottom plate on draw -in groove cooperation make two adjacent bottom plates be connected, the hook portion of the end of pothook includes top surface up, the top surface is provided with at least one bellied salient point that makes progress, the tank bottom of draw -in groove is provided with and feeds through to the gr