Dual blade adjustable boring cutter

The invention relates to a dual blade adjustable boring cutter which comprises boring cutters and a cutter rod. A boring cutter body which penetrates through an axis of the cutter rod is arranged on the cutter rod, the boring cutters are movably connected with two ends of the boring cutter body, each of the boring cutters and the horizontal plane of the boring cutter body form an angle of 45 degrees, and a groove with an inclined angle is arranged on the longitudinal end surface of the boring cutter body; a fixing pin is horizontally arranged at one end of the boring cutter body, an inclined surface which is matched with the groove of the boring cutter body is arranged on an outer circumference of the fixing pin, the end of the fixing pin is movably connected with a screw I, and the screw I is connected with the cutter rod in a threaded mode; and a plate is arranged at the other end of the boring cutter body, a V-shaped groove is arranged on the end surface of the plate, a roll ball is arranged in the V-shaped groove, the outer end of the roll ball contacts with a screw II through a spring, and the screw II is connected with the cutter rod in a threaded mode. The dual blade adjustable boring cutter has a simple structure, and the boring cutters can be detached so that the requirements for bore holes with different sizes are met.