Touch device and method, and automobile steering wheel auxiliary switch

The invention provides a touch device and method for a motor vehicle and an automobile steering wheel auxiliary switch. The touch device comprises a touch plane, a touch detection assembly, a pressuredetection assembly, a feedback assembly and a controller, wherein the touch detection assembly is tightly attached to a lower portion of the touch plane and used for detecting touch on the touch plane and generating a touch detection signal; the pressure detection assembly is used for detecting a pressing force generated when the touch plane is touched and generating a pressure detection signal;the feedback assembly is used for outputting a vibration feedback signal enabling the touch plane to vibrate; and the controller is used for acquiring a touch detection signal and a pressure detectionsignal, under the condition that the touch detection signal and the pressure detection signal are both effective signals, generating a touch signal based on the touch detection signal and the pressure detection signal, generat