The invention relates to a cantilever type multi-parameter independent detecting device and method, and belongs to an arm type sensor and a detecting method. A fixed plane of a vehicle frame is selected as a fixed surface. A base and the fixed surface are fixed together by a first bolt and a second bolt. A cantilever beam and the base are fixedly connected. A beam end magnet is located at one endof the cantilever beam and is opposite to objects to be tested, a following-up magnet and the objects to be tested are fixed together by a bonding layer, and the following-up magnet is opposite to thebeam end magnet. The cantilever type multi-parameter independent detecting device is of a novel structure and easy to install, external power supply is not needed, energy conservation and environmental protection are achieved, and parameters of the three objects to be tested can be independently and accurately detected through one device.