Based on the study of geotechnical dynamics characteristics, this paper analyzes its influence on tunnel engineering design. Tunnel engineering is an important part of underground engineering construction, and the characteristics of geotechnical dynamics are important factors affecting the design of tunnel engineering. It is found that the geotechnical dynamics characteristics have obvious influence on tunnel engineering design, including influence on tunnel technology selection, influence on tunnel construction safety, influence on tunnel design specifications, etc. Therefore, the study of geotechnical dynamic characteristics not only provides important technical support for the design of tunnel engineering, but also has important significance for the safety and stability of tunnel engineering. The research of this paper provides important theoretical guidance for tunnel engineering design and helps to improve the level of tunnel engineering design.In summary, the construction design of a tunnel project requires not only specialised technical the construction progress and the quality of the work, but also Large equipment and tools are also required to work together with the construction personnel to complete the construction of the tunnels. Before construction, specialised units are required to carry out specialised geological forecasts and The construction of the tunnels will require specialised geological forecasting and advanced exploration work to inform the construction requirements. Timely feedback on the construction situation to geological survey and design and construction units, especially in the case of rock mechanics in tunnels. The need for experts in the field of mechanics to carry out multifaceted investigations, only through the rational use of Only by making reasonable use of the rock mechanics in the tunnel can the tunnel be designed in a reasonable way and the use of the tunnel in the Only by making reasonable use of the rock structure of the tunnel can the design of the tunnel be rationalised and the frequency of accidents be reduced.