The invention discloses a rectifying and reinforcing method of shield tunnels. The method comprises the following steps: A, evaluating safety of the shield tunnels to be rectified and reinforced to obtain current pipe segment stress state; B, executing the step C when the current pipe segment stress state meets the requirements of specification and structural calculation; executing the step C after the stress of the shield tunnels to be rectified and reinforced is released when the current pipe segment state has been in the critical state or has been out of the limit; C, determining main deforming and readjusting directions and secondary deforming and readjusting directions according to main deviation directions of the tunnels; and D, firstly grouting and rectifying the main deforming and readjusting directions, and then grouting and rectifying the secondary deforming and readjusting directions again. Through the adoption of the rectifying and reinforcing method of the shield tunnels, the operated metro shield tunnels with large-range settlement deviation in the reclamation areas can be effectively rectified and reinforced.