When a specific type of precision instrument semitrailer transport vehicle manufactured by a domestic semitrailer producer traverses uneven road conditions, the traction suspension system is susceptible to rigid impacts, compromising the vehicle’s smoothness and posing safety risks to the transported precision instruments. To address this issue, the author has introduced the fundamental principles of an innovative traction suspension mechanism, proceeded with prototype development, followed by detailed structural design, and ultimately established a parametric simulation model for the entire vehicle. Simulation analysis of ride comfort indicates that the installation of the novel traction suspension system reduces the vertical acceleration at the semitrailer’s center of gravity by 29.4%, significantly enhancing transportation smoothness. This improvement can serve as a valuable reference for the design and research efforts of relevant enterprises.