Roof trompil specialized tool, the mainly used floor top plate trompil, it includes the handle, bracing piece of characterized by handle cross connection, a working beam and a pull rod, the bracing piece is parallel with the working beam, the pull rod is with the bracing piece and the working beam is perpendicular and the pull rod is connected between bracing piece and working beam, the interval is 0.4~0.5m between bracing piece and the working beam, an electric drill is binded with three iron wires in the working beam top, the switch of electric drill is connected one and is acted as go -between, be equipped with the accent knothole of one row of pole height that is used for adjusting on the bracing piece, the wrench comprises a handle, the utility model provides high work efficiency has alleviateed manual labors such as transport stool, has reduced safe risk, alleviates the direct injury to people's eye and respiratory of the dust that produces simultaneously among the drilling process, is favorable to occupation health.