Abstract: In the teaching of vibration mechanics, the emphasis is generally put on the explanation of concepts and theories, involving a great deal of formula derivation, which makes it difficult for students to understand the essence of the subject. In this paper, the numerical simulation is applied in the teaching of vibration mechanics. Firstly, the main problems of vibration mechanics are put forward, and several typical numerical simulation examples of vibration mechanics are presented. Thus, some phenomena and concepts in vibration mechanics are directly simulated by the finite element software. Through the questionnaire and the analysis of the related score distributions before and after the application, it is found that the teaching of vibration mechanics combined with numerical simulation can improve students' intuitive understanding of complicated problems of vibration mechanics, effectively stimulate students' learning enthusiasm, improve students' autonomous learning ability, and cultivate their ability to analyze and solve practical problems by means of numerical modeling and numerical analysis.