Shield tunneling machine with split type connecting structure

The invention relates to the technical field of shield tunneling machines, in particular to a shield tunneling machine with a split type connecting structure, which comprises a first shell, a second shell, a third shell and a fourth shell, a fixed ring is arranged on the surface of the second shell, a fixed hole is formed in the surface of the fixed ring, a movable ring is inserted into the ring groove, a screw rod is arranged on the surface of the movable ring, an adjusting groove is formed in the surface of the movable ring, and a first gear is inserted into the adjusting groove; the first motor is arranged in the first shell; the device has the beneficial effects that a first shell and a second shell are hoisted to the same position, the end of the first shell is aligned with the end of the second shell, a movable ring abuts against the surface of a fixed ring, a first motor drives a first gear to rotate, the first gear rotates to drive the movable ring to rotate, and the movable ring rotates in a ring gro