Fabricated boring cutter

The utility model belongs to a fabricated boring cutter which comprises a boring cutter handle (1) and a boring cutter handle quick-change connector (2). The fabricated boring cutter is characterized in that the right end of the boring cutter handle (1) is provided with a hole, a long connecting rod (6) is installed in the hole, and the connection portion between the long connecting rod (6) and the boring cutter handle (1) is small gap positioning matching and fixedly connected through a GB73-85 fastening screw (3). The right end of the long connecting rod (6) is also provided with a hole, the boring cutter handle quick-change connector (2) is installed in the hole, and the connecting portion between the boring cutter handle quick-change connector (2) and the long connecting rod (6) is also the small gap positioning matching and fixedly connected through a CB73-85 fastening screw (3). The fabricated boring cutter can quickly and conveniently replace the boring cutter handle, not only ensures the size precision of a tool, but also saves time, reduces the working strength of an operator, and is high in producing efficiency and high in processing quality.