The design method and principle of box exciter structural components (including bearing device, eccentric block structure and exciter seat structure) for inertial vibration equipment are introduced, the bearings used in the exciter are ordinary spherical roller bearings with large clearance, the outer ring tolerance of the bearing adopts P or N class fit with large interference amount, and the inner ring adopts H class fit. The bearing lubrication adopts lithium-based grease lubricant, and the seal adopts labyrinth, felt ring and lip sealing ring. There are three ways to adjust the excitation force, namely adjusting the weight of the eccentric block, the size of the eccentricity, and adjusting the weight and eccentricity of the eccentric block at the same time. The synchronization of dual-axis exciter generally adopts self-synchronization. The exciter designed according to this has a good effect after field use.