Floor installation hammer mainly includes tup and the hammer handle of being connected with the tup, the tup is provided with the rubber body of hammering face for both ends, the positive intermediateposition of rubber body bottom has been offered one and has been taken internal screw thread round platform connected in star, and the adapter sleeve of being made by iron or titanium alloy materialis cup jointed at the middle part of the rubber body, wear to be equipped with a round hole on the position of adapter sleeve corresponding to rubber body round platform connected in star, the one endof hammer handle is provided with the handle, and the other end is provided with a link of taking round platform shape external screw thread, the link of hammer handle pass behind the round hole withthe rubber body on the round platform shape groove thread that sets up be connected, an annular groove has been seted up on the upper portion of hammer handle, is provided with a tape measure area inthis annular groove, the one end in tape measure area fix in the annular groove, the other end is in through the buckle joint that sets up in this tip outer fringe on the hammer handle, it has simplestructure, and the practicality is strong, carries or easy dismounting, and has the characteristics such as function of measurement size.