Rear torsion beam of automobile

A rear torsion beam of an automobile belongs to a driving system of the automobile and comprises a beam body, a corbel assembly, a stabilizer bar, a resonance block and a resonance block limiting base. The beam body is in an omega type and has the advantages of being simple and easy in punch forming, convenient to be installed and welded with the corbel assembly, and not easy to generate defects such as deformation; the resonance block is provided with an opening; and the resonance block limiting base is added under the resonance block to prevent the performance of the rear torsion beam from being influenced by the vibration of the resonance block driven by the twist of the stabilizer bar during a driving process. A fracture zone of a blanking side of the beam is not required for grinding and polishing during a manufacturing process, not only the labor intensity of field operators and the production cost are reduced and the performance stability of the rear torsion beam, but also qualitative change of materials of the resonance block under high temperature effect of an electrophoresis chamber is avoided, and influence on the performance of the rear torsion beam is avoided.