The utility model provides a workover string which comprises a tubing string, a first valve and a packer are arranged on the tubing string, the first valve is located above the packer, a releasing device is connected to the lower end of the tubing string, and a bridge plug is connected to the lower portion of the releasing device. According to the workover string provided by the utility model, four operations of bridge plug driving, bridge plug sealing performance verification, sleeve sealing performance verification and well washing and killing can be completed by only tripping in the stringonce, so that the operation period is effectively shortened, the operation cost is reduced, and the damage of well washing liquid to a production layer is avoided.