The invention discloses a full-automatic chamfering machine. The full-automatic chamfering machine comprises a rack, an electronic control mechanism and a chamfering mechanism. The chamfering mechanism is provided with a rose reamer, the chamfering mechanism comprises an upper chamfering mechanism body and a lower chamfering mechanism body which are installed on the upper face and the lower face of a working table used for storing a saw blade correspondingly, and the working table is installed on the rack; and a material pushing mechanism is installed on the working table, a saw blade positioning mechanism is installed below the working table, a hole finding mechanism and a saw blade pressing mechanism are arranged above the working table, and a carrying manipulator is further installed onthe rack. According to the full-automatic chamfering machine, feeding is conducted through the material pushing mechanism, the positioning mechanism conducts positioning, the hole finding mechanism is used for determining the center of a positioning hole, the saw blade pressing mechanism is used for fixing the saw blade, double-faced chamfering is completed by the upper chamfering mechanism bodyand the lower chamfering mechanism body, discharging is completed through the carrying manipulator, and the operation process of each mechanism is conducted in a full automatic mode; and the machiningefficiency is greatly improved, the cost is greatly reduced, meanwhile the chamfering effect is more attractive, the precision is higher, and the centers of a chamfered hole and the original positioning hole coincide with each other.