Under the conditions of chaos and on the basis of the chaos criterion for the system about Smale horse hoof commutation of thin rectangular plate in the transverse electromagnetic field under distributed transverse loads, the differential equations of Duffing vibration system were built by the method of Melnikov function. The chaotic motion of the coupled vibration of the thin elasticmagnetic plate was analyzed.The vibration system was simulated by Matlab program, the chaotic characteristics were analyzed, and the phase diagrams and wave diagrams of displacement with different γwere obtained.The results were compared with those obtained by Melnikov function method in paper (Ⅰ), and the two results were identical. The chaotic motion of the simulating experiment was of more digital characteristics. The method in this paper can be extended to study the elasticmagnetic vibration of thin plate under different boundary conditions and different external loads.