Overturning method of cutter head of super large-diameter shield machine

The invention discloses an overturning method of a cutter head of a super large-diameter shield machine. A mobile crane, a gantry crane arranged on a foundation pit construction site in a manner of erection, a plurality of annular steel wire ropes and a plurality of shackles are employed by the method, and the method comprises the following steps of firstly moving the gantry crane and the crane tothe ground beside foundation pits, and making the cutter head located between the crane and the gantry crane; connecting lifting points on the cutter head with lifting hooks of the gantry crane and lifting hooks of the crane through the annular steel wire ropes and the shackles; and operating the gantry crane and the crane to cooperatively work to make the cutter head overturned to a vertical state from a horizontal state. According to the overturning method of the cutter head of the super large-diameter shield machine disclosed by the invention, the overturning operation of the cutter head of the super large-diamete