Nailing hammer capable of preventing injury

The invention relates to a hammer, in particular to a nailing hammer capable of preventing injury. A hammer head in a device can be replaced, and the situation that the whole hammer cannot be used dueto the hammer head is damaged when the device is used for a long time is avoided; a hammer handle and a hammer body component in the device can be separated, and the placing space of the device can be saved when the device is not in use; and by means of the device, an iron nail can be temporarily fixed on the hammer body component, holding the nail by hands is not needed when the nailing is performed, and the injury to hands when people perform the nailing is avoided. The hammer body component comprises a hammer body, a nail head groove, vertical convex strips, a nail head jacking block and ahammer handle connection block, the left end of the hammer body is fixedly connected with the nail head jacking block, the part, at the left end of the nail head jacking block, of the hammer body isprovided with the nail head