Shield tunneling machine cutterhead, cutter changing method and shield tunneling machine

The invention relates to a shield tunneling machine cutterhead, a cutter changing method and a shield tunneling machine, and the shield tunneling machine cutterhead comprises a main beam which extends from the center of the cutterhead to the radial direction of the cutterhead; the cutter is arranged on the main beam; the first sliding rail is arranged in the main beam and extends in the extending direction of the main beam, and the first sliding rail is configured to be located at the top or the bottom of the main beam in the state that the extending direction of the main beam is roughly parallel to the horizontal direction; and the conveying part is movably arranged on the first sliding rail, and the conveying part is configured to move along the first sliding rail so as to convey a tool changing assembly. An operator can replace any cutter in the main beam in the horizontal state without climbing to cutter replacing stations at different heights, so that the cutter replacing efficiency is improved. 本公开涉及一种盾