In order to realize the modularization and precision design of the device, and improve the safety and stability of the equipment operation, a vehicle automatic adjustment and leveling device was designed. The static load strength analysis and modal analysis of the electromechanical automatic leveling device were carried out by ANSYS Workbench to verify the strength performance of the automatic leveling device and confirm that the device leg does not resonance with the optical platform. The results show that the leveling device meets the load bearing requirements under general working conditions, and the mode state of the leg and the optical platform does not resonance with each other.