The invention discloses a floor mounting hammer. The floor mounting hammer mainly comprises a hammer head and a hammer handle connected with the hammer head, wherein the hammer head is a rubber body with hamming surfaces at the two ends; a cone frustum shaped groove with inner threads is formed in the middle position of the bottom of the rubber body; the middle part of the rubber body is in sleeveconnection with a connecting sleeve which is made of an iron or titanium alloy; a circular hole is formed in a position, corresponding to the cone frustum shaped groove of the rubber body, of the connecting sleeve in a penetrating mode; one end of the hammer handle is provided with a handle; the other end of the hammer handle is provided with a connecting end with cone frustum shaped outer threads; the connecting end of the hammer handle penetrates through the circular hole, and then is in threaded connection with the cone frustum shaped groove in the rubber body; a ring-shaped groove is formed in the upper part of the hammer handle; a tape measure belt is arranged in the ring-shaped groove; one end of the tape measure belt is fixedly arranged in the ring-shaped groove; and the other endof the tape measure belt is buckled on the hammer handle through the buckle on the outer edge of the end part. The floor mounting hammer has the characteristics of being simple in structure, high in practicability and convenient to carry or dismount, having a function of measuring the dimension and the like.