Sealed starting and receiving device of shield machine with welding connection and operation method thereof

The invention discloses a sealed starting and receiving device of a shield machine main machine with welding connection and an operation method thereof. The sealed starting and receiving device comprises steel sleeve A1 blocks, steel sleeve A2 blocks, steel sleeve A3 blocks, steel sleeve B1 blocks, steel sleeve B2 blocks, steel sleeve C blocks, a transition connecting plate, a rear end cover, a reaction rack, reference ring jacks, bolts, water swelling rubber seals and the like; and two first sealing doors for welding or cutting are arranged on both sides of each steel sleeve, the first sealing doors are arranged on the welding seam positions of a front shield and a middle shield and the middle shield and a tail shield which are at an angle of 45 degrees with the horizontal on both sides of each steel sleeve. According to the sealed starting and receiving device of the shield machine main machine with welding connection and the operation method thereof, the problems of swivel inconvenience and low efficiency