Rolling correction mechanism and method of confinement space bending device

The invention provides a rolling correction mechanism and method for a confinement space bending device, the rolling correction mechanism comprises a bending machine body unit, a fixed supporting unit, a driving walking unit and a rolling correction unit, the rolling correction mechanism comprises a headstock part and a tailstock part, and the headstock part comprises a bending machine body unit, a fixed supporting unit, a driving walking unit and a rolling correction unit; the fixed support unit comprises a first fixed support module, a first support hydraulic cylinder, a first guide module, a second support hydraulic cylinder, a second guide module, a third support hydraulic cylinder and a third guide module; the shell, the wheel set module, the motor module and the transmission module element are arranged in the driving walking unit; the rolling deviation rectifying unit comprises a first base, a first rolling module, a second base and a second rolling module; the vehicle tail part comprises a second fixed