Shield tunneling machine capable of replacing large and small pipelines

The utility model discloses a shield tunneling machine capable of replacing big and small pipelines, which comprises a shell, a cutterhead and a cutterhead driving part, the cutterhead is arranged at the front end of the shell, the cutterhead driving part is arranged in the shell and is in driving connection with the cutterhead, and the shield tunneling machine is characterized in that the cutterhead comprises a cutterhead body, a central shaft, a first spoke, an inner ring and an outer ring; the center shaft is arranged at the front end of the cutterhead body and corresponds to the center position of the cutterhead body, an inner ring and an outer ring are arranged on the periphery of the center shaft, the inner ring is located between the center shaft and the outer ring, and each first spoke is connected with the center shaft, the inner ring and the outer ring. A plurality of advancing cutters are arranged on the front end face of each first spoke in the radial direction in an array mode, a plurality of scr