Abstract: While using displacement excitation instead of the ultrasonic transducer to model ultrasonic transducer and a plate with cracks, a big mistake might be made because of the lacking of contacting and colliding. The electric-mechanic analogous excitation method was therefore adopted by setting the finite elements model between the transducer and plate with crack, and contrasting the model of the plate with cracks under displacement excitation. The characteristics of crack induced heating and the plate vibration under different ultrasonic excitations were analyzed in detail. The results of simulation and experiment not only indicate that the model of transducer and a plate with cracks is much closer to the real model, but also prove that the electric-mechanic analogous excitation method is efficacious and feasible. The research of ultrasonic excitation patterns will help readers to preferably establish finite elements model which is closer to the real one, and provide the theory support for the mechanism research of crack heating.