Non-contact life parameters radar detection means

The utility model relates to a radar non-contact life parameter detecting device, which comprises two front-built amplifying stages, a demodulator circuit, two low pass filters, three high pass filters, a front-built circuit, an amplifying circuit, a switch circuit, a buffer stage, a low pass filters group selective circuit, an emitting device, a power amplifying stage, a sound speaker, a back circuit, two changeable gain amplification circuits, two power frequency trap filter circuits, and two photoelectric coupled circuits. The utility model treats the frequency sweep and point frequency output by the radar, and makes the breathing and heart beating signals of live people taken out for separating and amplifying to be send out. The utility model can be used for seeking the live people under the wasteland or at the back of the barrier with non-contact monitoring.