Aimed at the current situation of steel plate installation in tunnel maintenance,a 7-DOF steel plate installation manipulator was designed.SolidWorks software was used to carry out 3D solid modeling for the manipulator.In order to ensure the rationality of the design of the manipulator,the manipulator was analyzed under limit conditions in the motion range.The static and modal state of the manipulator were analyzed by using SolidWorks and ANSYS Workbench,and the stressstrain nephograms and natural frequency and vibration pattern diagrams were obtained.The results show that the structural strength of the manipulator meets the design requirements,and the resonance can be effectively avoided in work.It provides reference for the further optimization design of the manipulator.