Coaxial sleeving auxiliary device and coaxial sleeving method

The invention belongs to the technical field of mechanical assembly, and discloses a coaxial sleeving auxiliary device and a coaxial sleeving method. The coaxial sleeving auxiliary device comprises a base, a supporting seat and a supporting structure, and a first cylinder part is arranged on the supporting seat in the x-axis direction, so that the axis direction of the first cylinder part is parallel to the x-axis direction; the shape correcting cambered surface of the shape correcting assembly abuts against and is attached to the surface of the first cylinder part, so that the shape of the first cylinder part is corrected; the supporting structure is used for supporting and adjusting the position of the center long shaft so as to adjust the axis direction and position of the second cylinder part, axis coincidence of the second cylinder part and the first cylinder part can be adjusted, and the distance between the axes is smaller than the unilateral gap. According to the device, the situation that the first c