The invention discloses a shielding component for a high-speed connector, a module structure for a high-speed connector and a high-speed connector. The module structure comprises signal transmission modules and shielding components mounted on the signal transmission modules, wherein the shielding components on the adjacent signal transmission modules are in contact with each other; the shielding component on one of the signal transmission modules is provided with an elastic structure protruding toward the shielding component of the adjacent signal transmission module; and the shielding component on the adjacent signal transmission module has a grounding wire structure overlapped with the elastic structure. The module structure uses the shielding components formed by combining a first shielding component and a second shielding component, and is provided with the elastic structure and the grounding wire structure at corresponding positions in the shielding components. The elastic structure on the shielding component and the grounding wire structure on the adjacent shielding component are overlapped with each other so as to shorten a backflow path as much as possible and improve crosstalk between differential pairs.