Splicing floor unit and bottom plates thereof

The invention relates to the field of floors, in particular to a splicing floor unit and bottom plates thereof. Each bottom plate is rectangular and comprises an upper surface and a lower surface which limit the thickness of the bottom plate, and further comprises edge parts located around the bottom plate; at least one pair of opposite edge parts is provided with clamping grooves, and openings ofthe clamping grooves face towards the lower surfaces; a plurality of clamping hooks are arranged at the at least one pair of opposite edge parts of the bottom plates in an outwards extending mode correspondingly, and hook parts at the tail ends of the clamping hooks extend upwards; the clamping hooks are suitable for being matched with the clamping grooves in the adjacent bottom plate, so that the two adjacent bottom plates are connected; the hook parts at the tail ends of the clamping hooks comprise upwards top faces, and the top faces are each provided with at least one upward-protruding protruding points; the groo