The utility model discloses a timber trepanning groove ware aims at providing the timber trepanning groove ware that machining efficiency is high. It includes the drill bit pole to and fixed the setting connects in the rig of drill bit pole afterbody, the point portion of drill bit pole is called the upper end, and the other end is called the lower extreme, its still including fixed suit on the drill bit pole, coaxial and be used for the drum of trompil with the drill bit pole, connecting plate suit through polylith uniform annular on the drum, the orientating group seating ring coaxial with the drum just to and set up in connecting plate upper end, be used for grooved saw blade, the drum upper end is provided with annular sawtooth part, and is less than the sharp portion of drill bit on it, the saw blade stretches out the one section distance in orientating group seating ring upper end, and is less than the upper end of drum. The utility model is suitable for a trepanning groove of all kinds of timber uses.