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This invention discloses an electromagnetic excitation device, relating to the field of seismic exploration technology. It includes a housing assembly, an excitation assembly, and a vibrating plate. The housing assembly includes a housing body with a first receiving groove having a first opening facing a first direction. The excitation assembly is disposed within the first receiving groove and includes two permanent magnets and an electromagnet. The two permanent magnets are arranged opposite each other with the same pole along a second direction and connected to the bottom wall of the first receiving groove. The electromagnet is disposed between the two permanent magnets and connected to the housing body. When an alternating current is applied, it vibrates back and forth between the two permanent magnets, generating an excitation force that acts on the housing body. The vibrating plate is disposed on the side of the bottom wall of the first receiving groove facing away from the first opening and is coupled to the ground. When the electromagnet is energized, it is subjected to the excitation force transmitted by the housing body and acts on the ground. Thus, the structure is simple, the overall size is small, the weight is light, and it is easy to carry. Simultaneously, it generates a large amplitude and excitation force, improving exploration accuracy and depth.