Reinforcing structure for shield tunneling machine underneath passing railway

The invention discloses a reinforcing structure for a shield to pass through a railway, and belongs to the technical field of railway roads, the reinforcing structure for the shield to pass through the railway comprises a track and a plurality of sets of sleepers, and a shell is fixedly installed in the middle of the lower end of the track; a stretching mechanism is arranged in the shell, a first fixing mechanism and a second fixing mechanism are arranged in the stretching mechanism, and an auxiliary locking mechanism is arranged on the upper side of the shell; the stretching mechanism comprises a motor fixedly installed on one side of the lower end face in the shell, a second threaded rod is arranged on one side of the motor, first threaded rods are fixedly installed at the two ends of the second threaded rod, and an output shaft of the motor is fixedly connected with one set of first threaded rods. According to the scheme, by arranging the stretching mechanism, the first fixing mechanism, the second fixing