Combined-type multifunctional boring cutter

The invention discloses a combined-type multifunctional boring cutter. The multifunctional boring cutter is sequentially composed of a cutter bar, a cutter bit and a blade. The connection structure that the cutter bar and the cutter bit are not coaxial is adopted for arrangement, and the diameter of the cutter is changed by adjusting different directions. Compared with the prior art, the combined-type multifunctional boring cutter is simple in structure, low in cost and easy to maintain; the combined-type multifunctional boring cutter with the simple structure can be widely applied to rough and fine machining, and cost can be lowered; various boring cutters for standard-size machining can be obtained through different-model combination, adjustment is convenient, and the service life of the boring cutter is also prolonged.