In response to difficulties,high risks,and low efficiency of the extra large cutterhead reversing operation,a design scheme for the cutterhead reversing device is built by three-dimensional software.Hinge positions at both ends of the hydraulic cylinder are reasonably selected according to the requirements of the deck space,and appropriate hydraulic cylinder shape parameters are selected on the basis of this.Force states of the reversing device at five angles are analyzed by the enumeration method,and hydraulic cylinder parameters are calculated to meet the force requirements.The structural strength and stiffness of the cutterhead bracket and base are verified by finite analysis software.The results show that the developed cutterhead reversing device can improve the efficiency of cutterhead reversing and reduce labor safety risks of crew members.