This paper proposes a novel concept of an S-shaped tube-bar structure aimed at effectively propagating long-term stress waves. The structure is composed of several circular ring-shaped tubes, which are identical cross-sectional area with the transmitted used in Hopkinson bar. They are interconnected successively in an S-shaped pattern at both ends through flanges, and used as the transmitted bar of traditional Hopkinson bar apparatus to guide a long-term transmitted stress wave. Its flanges are elaborately designed to achieve nearly total transmission, which are optimized and confirmed via series of numerical simulation. Based on the finite element model of Hopkinson bar loading, a long-term stress wave propagation is achieved through S-shaped structure, which is even up to ten milliseconds. This invented structure is introduced to perform a high frequency impact fatigue loading with aid of the previous work concerning long incident stress wave loading, and the tensile impact fatigue loading of metal materials at the order of 103 Hz was realized by this equipment. Additionally, this structure could be used to other dynamic loading equipment, such as intermediate strain rate experiments and high overload techniques, due to its high capacity for propagating long-term and limited size and length. More extensive investigation will further contribute to the advancement of Hopkinson bar experimental techniques.