Steering wheel rotation angle sensor device and electronic stability program system of automobile

A rotation angle sensor device for a steering wheel comprises a magnetic induction sensor (2) and a rotation angle transmission component (5). A transmission structure is formed between an upper pipe section (13) of the rotation angle transmission component (5) and a clock spring mechanism (1). The inner circumference of the upper pipe section (13) is provided with a radial location mechanism (7) and a first axial location mechanism. The outer circumference of the upper pipe section (13) is provided with a second axial location mechanism. An inner bush (21) of the magnetic induction sensor (2) is provided with a third axial location mechanism. The outer circumference of the upper pipe section (13) and the inner bush (21) of the magnetic induction sensor (2) are also provided with a circumferential locking and transmission mechanism. An electronic stabilization system for an automobile comprises the rotation angle sensor device for the steering wheel connected with a central control unit via a signal line. The rotation angle sensor device for the steering wheel of the present invention adopts the magnetic induction sensor which is more reliable in work, realizes the installation and the precise location of the magnetic induction sensor within a limited space below a steering wheel, and reliably transfers the rotation of the steering wheel to the magnetic induction sensor.